499979779 has 16 divisors (see below), whose sum is σ = 555097312. Its totient is φ = 447337728.

The previous prime is 499979761. The next prime is 499979783. The reversal of 499979779 is 977979994.

It is a cyclic number.

It is not a de Polignac number, because 499979779 - 2¹⁵ = 499947011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499979759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134287 + ... + 137959.

It is an arithmetic number, because the mean of its divisors is an integer number (34693582).

Almost surely, 2^499979779 is an apocalyptic number.

499979779 is a deficient number, since it is larger than the sum of its proper divisors (55117533).

499979779 is a wasteful number, since it uses less digits than its factorization.

499979779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006.

The product of its digits is 81015228, while the sum is 70.

The square root of 499979779 is about 22360.2276151206. The cubic root of 499979779 is about 793.6898262276.

The spelling of 499979779 in words is "four hundred ninety-nine million, nine hundred seventy-nine thousand, seven hundred seventy-nine".