137478733 has 4 divisors (see below), whose sum is σ = 157118560. Its totient is φ = 117838908.

The previous prime is 137478727. The next prime is 137478739. The reversal of 137478733 is 337874731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 337874731 = 151 ⋅2237581.

It is an interprime number because it is at equal distance from previous prime (137478727) and next prime (137478739).

It is a cyclic number.

It is not a de Polignac number, because 137478733 - 2⁹ = 137478221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137478733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137478739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9819903 + ... + 9819916.

It is an arithmetic number, because the mean of its divisors is an integer number (39279640).

Almost surely, 2^137478733 is an apocalyptic number.

It is an amenable number.

137478733 is a deficient number, since it is larger than the sum of its proper divisors (19639827).

137478733 is an equidigital number, since it uses as much as digits as its factorization.

137478733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19639826.

The product of its digits is 296352, while the sum is 43.

The square root of 137478733 is about 11725.1325365644. The cubic root of 137478733 is about 516.1134460516.

The spelling of 137478733 in words is "one hundred thirty-seven million, four hundred seventy-eight thousand, seven hundred thirty-three".