868579519 has 2 divisors, whose sum is σ = 868579520. Its totient is φ = 868579518.

The previous prime is 868579409. The next prime is 868579561. The reversal of 868579519 is 915975868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868579519 - 2⁹ = 868579007 is a prime.

It is a super-2 number, since 2×868579519² = 1508860761652542722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868579619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434289759 + 434289760.

It is an arithmetic number, because the mean of its divisors is an integer number (434289760).

Almost surely, 2^868579519 is an apocalyptic number.

868579519 is a deficient number, since it is larger than the sum of its proper divisors (1).

868579519 is an equidigital number, since it uses as much as digits as its factorization.

868579519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5443200, while the sum is 58.

The square root of 868579519 is about 29471.6731625471. The cubic root of 868579519 is about 954.1204291505.

The spelling of 868579519 in words is "eight hundred sixty-eight million, five hundred seventy-nine thousand, five hundred nineteen".