868579913 has 2 divisors, whose sum is σ = 868579914. Its totient is φ = 868579912.

The previous prime is 868579909. The next prime is 868579951. The reversal of 868579913 is 319975868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805027129 + 63552784 = 28373^2 + 7972^2 .

It is a cyclic number.

It is not a de Polignac number, because 868579913 - 2² = 868579909 is a prime.

It is not a weakly prime, because it can be changed into another prime (868579903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434289956 + 434289957.

It is an arithmetic number, because the mean of its divisors is an integer number (434289957).

Almost surely, 2^868579913 is an apocalyptic number.

It is an amenable number.

868579913 is a deficient number, since it is larger than the sum of its proper divisors (1).

868579913 is an equidigital number, since it uses as much as digits as its factorization.

868579913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 56.

The square root of 868579913 is about 29471.6798469310. The cubic root of 868579913 is about 954.1205734180.

The spelling of 868579913 in words is "eight hundred sixty-eight million, five hundred seventy-nine thousand, nine hundred thirteen".