137656457 has 4 divisors (see below), whose sum is σ = 137944320. Its totient is φ = 137368596.

The previous prime is 137656451. The next prime is 137656471. The reversal of 137656457 is 754656731.

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: 754656731 = 1933 ⋅390407.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137656457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137656451) 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, 143213 + ... + 144170.

It is an arithmetic number, because the mean of its divisors is an integer number (34486080).

Almost surely, 2^137656457 is an apocalyptic number.

It is an amenable number.

137656457 is a deficient number, since it is larger than the sum of its proper divisors (287863).

137656457 is an equidigital number, since it uses as much as digits as its factorization.

137656457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287862.

The product of its digits is 529200, while the sum is 44.

The square root of 137656457 is about 11732.7088517529. The cubic root of 137656457 is about 516.3357501289.

The spelling of 137656457 in words is "one hundred thirty-seven million, six hundred fifty-six thousand, four hundred fifty-seven".