856653131 has 2 divisors, whose sum is σ = 856653132. Its totient is φ = 856653130.

The previous prime is 856653071. The next prime is 856653157. The reversal of 856653131 is 131356658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856653131 - 2¹⁴ = 856636747 is a prime.

It is a super-2 number, since 2×856653131² = 1467709173704206322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (856653431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428326565 + 428326566.

It is an arithmetic number, because the mean of its divisors is an integer number (428326566).

Almost surely, 2^856653131 is an apocalyptic number.

856653131 is a deficient number, since it is larger than the sum of its proper divisors (1).

856653131 is an equidigital number, since it uses as much as digits as its factorization.

856653131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 38.

The square root of 856653131 is about 29268.6373273509. The cubic root of 856653131 is about 949.7333068558.

The spelling of 856653131 in words is "eight hundred fifty-six million, six hundred fifty-three thousand, one hundred thirty-one".