868320853 has 2 divisors, whose sum is σ = 868320854. Its totient is φ = 868320852.

The previous prime is 868320823. The next prime is 868320857. The reversal of 868320853 is 358023868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802418929 + 65901924 = 28327^2 + 8118^2 .

It is a cyclic number.

It is not a de Polignac number, because 868320853 - 2⁵ = 868320821 is a prime.

It is a super-2 number, since 2×868320853² = 1507962207509295218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868320857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434160426 + 434160427.

It is an arithmetic number, because the mean of its divisors is an integer number (434160427).

Almost surely, 2^868320853 is an apocalyptic number.

It is an amenable number.

868320853 is a deficient number, since it is larger than the sum of its proper divisors (1).

868320853 is an equidigital number, since it uses as much as digits as its factorization.

868320853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 868320853 is about 29467.2844524228. The cubic root of 868320853 is about 954.0257062868.

The spelling of 868320853 in words is "eight hundred sixty-eight million, three hundred twenty thousand, eight hundred fifty-three".