2479399021 has 12 divisors (see below), whose sum is σ = 2726500000. Its totient is φ = 2252998440.

The previous prime is 2479399009. The next prime is 2479399033. The reversal of 2479399021 is 1209939742.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2479399009) and next prime (2479399033).

It is not a de Polignac number, because 2479399021 - 2¹³ = 2479390829 is a prime.

It is a super-2 number, since 2×2479399021² = 12294839010671516882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2479399081) 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, 493480 + ... + 498478.

Almost surely, 2^2479399021 is an apocalyptic number.

It is an amenable number.

2479399021 is a deficient number, since it is larger than the sum of its proper divisors (247100979).

2479399021 is a wasteful number, since it uses less digits than its factorization.

2479399021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9120 (or 9109 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 2479399021 is about 49793.5640519937. The cubic root of 2479399021 is about 1353.4705438075.

The spelling of 2479399021 in words is "two billion, four hundred seventy-nine million, three hundred ninety-nine thousand, twenty-one".