868394431 has 2 divisors, whose sum is σ = 868394432. Its totient is φ = 868394430.

The previous prime is 868394393. The next prime is 868394521. The reversal of 868394431 is 134493868.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 868394431 - 2¹⁷ = 868263359 is a prime.

It is a super-2 number, since 2×868394431² = 1508217775583627522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868391431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434197215 + 434197216.

It is an arithmetic number, because the mean of its divisors is an integer number (434197216).

Almost surely, 2^868394431 is an apocalyptic number.

868394431 is a deficient number, since it is larger than the sum of its proper divisors (1).

868394431 is an equidigital number, since it uses as much as digits as its factorization.

868394431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 46.

The square root of 868394431 is about 29468.5328952766. The cubic root of 868394431 is about 954.0526522867.

The spelling of 868394431 in words is "eight hundred sixty-eight million, three hundred ninety-four thousand, four hundred thirty-one".