999931274479 has 2 divisors, whose sum is σ = 999931274480. Its totient is φ = 999931274478.

The previous prime is 999931274449. The next prime is 999931274501. The reversal of 999931274479 is 974472139999.

999931274479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999931274479 - 2²⁷ = 999797056751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999931274449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499965637239 + 499965637240.

It is an arithmetic number, because the mean of its divisors is an integer number (499965637240).

Almost surely, 2^999931274479 is an apocalyptic number.

999931274479 is a deficient number, since it is larger than the sum of its proper divisors (1).

999931274479 is an equidigital number, since it uses as much as digits as its factorization.

999931274479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 277766496, while the sum is 73.

The spelling of 999931274479 in words is "nine hundred ninety-nine billion, nine hundred thirty-one million, two hundred seventy-four thousand, four hundred seventy-nine".