879459021 has 24 divisors (see below), whose sum is σ = 1475611904. Its totient is φ = 494307360.

The previous prime is 879458969. The next prime is 879459043. The reversal of 879459021 is 120954978.

It is not a de Polignac number, because 879459021 - 2¹⁵ = 879426253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879459221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110581 + ... + 118266.

Almost surely, 2^879459021 is an apocalyptic number.

It is an amenable number.

879459021 is a deficient number, since it is larger than the sum of its proper divisors (596152883).

879459021 is a wasteful number, since it uses less digits than its factorization.

879459021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228921 (or 228918 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 879459021 is about 29655.6743474162. The cubic root of 879459021 is about 958.0875631657.

The spelling of 879459021 in words is "eight hundred seventy-nine million, four hundred fifty-nine thousand, twenty-one".