137934431 has 4 divisors (see below), whose sum is σ = 138149592. Its totient is φ = 137719272.

The previous prime is 137934421. The next prime is 137934443. The reversal of 137934431 is 134439731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134439731 = 9109 ⋅14759.

It is a cyclic number.

It is not a de Polignac number, because 137934431 - 2⁶ = 137934367 is a prime.

It is a super-2 number, since 2×137934431² = 38051814510587522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137934391 and 137934400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137934421) 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, 106616 + ... + 107901.

It is an arithmetic number, because the mean of its divisors is an integer number (34537398).

Almost surely, 2^137934431 is an apocalyptic number.

137934431 is a deficient number, since it is larger than the sum of its proper divisors (215161).

137934431 is an equidigital number, since it uses as much as digits as its factorization.

137934431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215160.

The product of its digits is 27216, while the sum is 35.

The square root of 137934431 is about 11744.5489909149. The cubic root of 137934431 is about 516.6830674410.

The spelling of 137934431 in words is "one hundred thirty-seven million, nine hundred thirty-four thousand, four hundred thirty-one".