856369201 has 2 divisors, whose sum is σ = 856369202. Its totient is φ = 856369200.

The previous prime is 856369117. The next prime is 856369211. The reversal of 856369201 is 102963658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851238976 + 5130225 = 29176^2 + 2265^2 .

It is a cyclic number.

It is not a de Polignac number, because 856369201 - 2¹⁷ = 856238129 is a prime.

It is not a weakly prime, because it can be changed into another prime (856369211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428184600 + 428184601.

It is an arithmetic number, because the mean of its divisors is an integer number (428184601).

Almost surely, 2^856369201 is an apocalyptic number.

It is an amenable number.

856369201 is a deficient number, since it is larger than the sum of its proper divisors (1).

856369201 is an equidigital number, since it uses as much as digits as its factorization.

856369201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 856369201 is about 29263.7865116598. The cubic root of 856369201 is about 949.6283683980.

The spelling of 856369201 in words is "eight hundred fifty-six million, three hundred sixty-nine thousand, two hundred one".