137750905 has 4 divisors (see below), whose sum is σ = 165301092. Its totient is φ = 110200720.

The previous prime is 137750903. The next prime is 137750911. The reversal of 137750905 is 509057731.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46280809 + 91470096 = 6803^2 + 9564^2 .

It is not a de Polignac number, because 137750905 - 2¹ = 137750903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137750903) 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, 13775086 + ... + 13775095.

It is an arithmetic number, because the mean of its divisors is an integer number (41325273).

Almost surely, 2^137750905 is an apocalyptic number.

It is an amenable number.

137750905 is a deficient number, since it is larger than the sum of its proper divisors (27550187).

137750905 is an equidigital number, since it uses as much as digits as its factorization.

137750905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27550186.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 137750905 is about 11736.7331485384. The cubic root of 137750905 is about 516.4538114995.

The spelling of 137750905 in words is "one hundred thirty-seven million, seven hundred fifty thousand, nine hundred five".