856926853 has 2 divisors, whose sum is σ = 856926854. Its totient is φ = 856926852.

The previous prime is 856926839. The next prime is 856926857. The reversal of 856926853 is 358629658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814702849 + 42224004 = 28543^2 + 6498^2 .

It is a cyclic number.

It is not a de Polignac number, because 856926853 - 2²⁹ = 320055941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856926853.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856926857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428463426 + 428463427.

It is an arithmetic number, because the mean of its divisors is an integer number (428463427).

Almost surely, 2^856926853 is an apocalyptic number.

It is an amenable number.

856926853 is a deficient number, since it is larger than the sum of its proper divisors (1).

856926853 is an equidigital number, since it uses as much as digits as its factorization.

856926853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 52.

The square root of 856926853 is about 29273.3129829884. The cubic root of 856926853 is about 949.8344505617.

The spelling of 856926853 in words is "eight hundred fifty-six million, nine hundred twenty-six thousand, eight hundred fifty-three".