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137387843 = 413350923
BaseRepresentation
bin10000011000001…
…01111101000011
3100120112000200122
420030011331003
5240132402333
621344410455
73255530435
oct1014057503
9316460618
10137387843
117060857a
123a016a2b
13226043a8
1414364655
15c0dc798
hex8305f43

137387843 has 4 divisors (see below), whose sum is σ = 140738808. Its totient is φ = 134036880.

The previous prime is 137387837. The next prime is 137387849. The reversal of 137387843 is 348783731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348783731 = 1579220889.

It is an interprime number because it is at equal distance from previous prime (137387837) and next prime (137387849).

It is a cyclic number.

It is not a de Polignac number, because 137387843 - 24 = 137387827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137387794 and 137387803.

It is not an unprimeable number, because it can be changed into a prime (137387849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675421 + ... + 1675502.

It is an arithmetic number, because the mean of its divisors is an integer number (35184702).

Almost surely, 2137387843 is an apocalyptic number.

137387843 is a deficient number, since it is larger than the sum of its proper divisors (3350965).

137387843 is an equidigital number, since it uses as much as digits as its factorization.

137387843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350964.

The product of its digits is 338688, while the sum is 44.

The square root of 137387843 is about 11721.2560333780. The cubic root of 137387843 is about 515.9996832620. Note that the first 3 decimals are identical.

The spelling of 137387843 in words is "one hundred thirty-seven million, three hundred eighty-seven thousand, eight hundred forty-three".

Divisors: 1 41 3350923 137387843