979408399 has 2 divisors, whose sum is σ = 979408400. Its totient is φ = 979408398.

The previous prime is 979408393. The next prime is 979408411. The reversal of 979408399 is 993804979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 979408399 - 2²⁵ = 945853967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979408393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489704199 + 489704200.

It is an arithmetic number, because the mean of its divisors is an integer number (489704200).

Almost surely, 2^979408399 is an apocalyptic number.

979408399 is a deficient number, since it is larger than the sum of its proper divisors (1).

979408399 is an equidigital number, since it uses as much as digits as its factorization.

979408399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 979408399 is about 31295.5012581681. The cubic root of 979408399 is about 993.0884738591.

The spelling of 979408399 in words is "nine hundred seventy-nine million, four hundred eight thousand, three hundred ninety-nine".