39979513 has 8 divisors (see below), whose sum is σ = 46096128. Its totient is φ = 33964224.

The previous prime is 39979501. The next prime is 39979517. The reversal of 39979513 is 31597993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39979513 - 2⁵ = 39979481 is a prime.

It is a super-2 number, since 2×39979513² = 3196722919434338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39979517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24481 + ... + 26062.

It is an arithmetic number, because the mean of its divisors is an integer number (5762016).

Almost surely, 2^39979513 is an apocalyptic number.

It is an amenable number.

39979513 is a deficient number, since it is larger than the sum of its proper divisors (6116615).

39979513 is a wasteful number, since it uses less digits than its factorization.

39979513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50663.

The product of its digits is 229635, while the sum is 46.

The square root of 39979513 is about 6322.9354733383. The cubic root of 39979513 is about 341.9367922357.

The spelling of 39979513 in words is "thirty-nine million, nine hundred seventy-nine thousand, five hundred thirteen".