56870137 has 4 divisors (see below), whose sum is σ = 56960896. Its totient is φ = 56779380.

The previous prime is 56870119. The next prime is 56870243. The reversal of 56870137 is 73107865.

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: 73107865 = 5 ⋅14621573.

It is a cyclic number.

It is not a de Polignac number, because 56870137 - 2¹⁵ = 56837369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56870096 and 56870105.

It is not an unprimeable number, because it can be changed into a prime (56876137) 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, 44433 + ... + 45694.

It is an arithmetic number, because the mean of its divisors is an integer number (14240224).

Almost surely, 2^56870137 is an apocalyptic number.

It is an amenable number.

56870137 is a deficient number, since it is larger than the sum of its proper divisors (90759).

56870137 is an equidigital number, since it uses as much as digits as its factorization.

56870137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90758.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 56870137 is about 7541.2291438465. The cubic root of 56870137 is about 384.5576231094.

The spelling of 56870137 in words is "fifty-six million, eight hundred seventy thousand, one hundred thirty-seven".