137433657 has 4 divisors (see below), whose sum is σ = 183244880. Its totient is φ = 91622436.

The previous prime is 137433643. The next prime is 137433691. The reversal of 137433657 is 756334731.

It is a happy number.

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: 756334731 = 3 ⋅252111577.

It is not a de Polignac number, because 137433657 - 2¹² = 137429561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137433607) 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, 22905607 + ... + 22905612.

It is an arithmetic number, because the mean of its divisors is an integer number (45811220).

Almost surely, 2^137433657 is an apocalyptic number.

It is an amenable number.

137433657 is a deficient number, since it is larger than the sum of its proper divisors (45811223).

137433657 is an equidigital number, since it uses as much as digits as its factorization.

137433657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45811222.

The product of its digits is 158760, while the sum is 39.

The square root of 137433657 is about 11723.2101832220. The cubic root of 137433657 is about 516.0570327862.

The spelling of 137433657 in words is "one hundred thirty-seven million, four hundred thirty-three thousand, six hundred fifty-seven".