501979 has 4 divisors (see below), whose sum is σ = 515584. Its totient is φ = 488376.

The previous prime is 501971. The next prime is 501997. The reversal of 501979 is 979105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 501979 - 2³ = 501971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 501979.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6747 + ... + 6820.

It is an arithmetic number, because the mean of its divisors is an integer number (128896).

2⁵⁰¹⁹⁷⁹ is an apocalyptic number.

501979 is a deficient number, since it is larger than the sum of its proper divisors (13605).

501979 is a wasteful number, since it uses less digits than its factorization.

501979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13604.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 501979 is about 708.5047635690. The cubic root of 501979 is about 79.4746303027.

The spelling of 501979 in words is "five hundred one thousand, nine hundred seventy-nine".