856926137 has 4 divisors (see below), whose sum is σ = 875158656. Its totient is φ = 838693620.

The previous prime is 856926127. The next prime is 856926167. The reversal of 856926137 is 731629658.

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.

It is a cyclic number.

It is not a de Polignac number, because 856926137 - 2¹⁸ = 856663993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 18232471 = 856926137 / (8 + 5 + 6 + 9 + 2 + 6 + 1 + 3 + 7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 856926091 and 856926100.

It is not an unprimeable number, because it can be changed into a prime (856926127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9116189 + ... + 9116282.

It is an arithmetic number, because the mean of its divisors is an integer number (218789664).

Almost surely, 2^856926137 is an apocalyptic number.

It is an amenable number.

856926137 is a deficient number, since it is larger than the sum of its proper divisors (18232519).

856926137 is a wasteful number, since it uses less digits than its factorization.

856926137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18232518.

The product of its digits is 544320, while the sum is 47.

The square root of 856926137 is about 29273.3007534169. The cubic root of 856926137 is about 949.8341860188.

The spelling of 856926137 in words is "eight hundred fifty-six million, nine hundred twenty-six thousand, one hundred thirty-seven".