499280391 has 12 divisors (see below), whose sum is σ = 721389240. Its totient is φ = 332758320.

The previous prime is 499280387. The next prime is 499280413. The reversal of 499280391 is 193082994.

It is not a de Polignac number, because 499280391 - 2² = 499280387 is a prime.

It is a super-2 number, since 2×499280391² = 498561817674225762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499280311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41356 + ... + 52046.

It is an arithmetic number, because the mean of its divisors is an integer number (60115770).

Almost surely, 2^499280391 is an apocalyptic number.

499280391 is a deficient number, since it is larger than the sum of its proper divisors (222108849).

499280391 is a wasteful number, since it uses less digits than its factorization.

499280391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15886 (or 15883 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 499280391 is about 22344.5830348208. The cubic root of 499280391 is about 793.3195738067.

The spelling of 499280391 in words is "four hundred ninety-nine million, two hundred eighty thousand, three hundred ninety-one".