679201591 has 2 divisors, whose sum is σ = 679201592. Its totient is φ = 679201590.

The previous prime is 679201583. The next prime is 679201639. The reversal of 679201591 is 195102976.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679201591 - 2³ = 679201583 is a prime.

It is a super-2 number, since 2×679201591² = 922629602433862562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679201541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339600795 + 339600796.

It is an arithmetic number, because the mean of its divisors is an integer number (339600796).

Almost surely, 2^679201591 is an apocalyptic number.

679201591 is a deficient number, since it is larger than the sum of its proper divisors (1).

679201591 is an equidigital number, since it uses as much as digits as its factorization.

679201591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 679201591 is about 26061.4963307942. The cubic root of 679201591 is about 879.0216360792.

The spelling of 679201591 in words is "six hundred seventy-nine million, two hundred one thousand, five hundred ninety-one".