515979 has 6 divisors (see below), whose sum is σ = 745316. Its totient is φ = 343980.

The previous prime is 515969. The next prime is 515993. The reversal of 515979 is 979515.

515979 = 70² + 71² + ... + 123².

It is a happy number.

It is not a de Polignac number, because 515979 - 2¹⁵ = 483211 is a prime.

It is a Duffinian number.

515979 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (515929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28657 + ... + 28674.

2⁵¹⁵⁹⁷⁹ is an apocalyptic number.

515979 is a deficient number, since it is larger than the sum of its proper divisors (229337).

515979 is a wasteful number, since it uses less digits than its factorization.

515979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57337 (or 57334 counting only the distinct ones).

The product of its digits is 14175, while the sum is 36.

The square root of 515979 is about 718.3167824853. The cubic root of 515979 is about 80.2067050362.

The spelling of 515979 in words is "five hundred fifteen thousand, nine hundred seventy-nine".