879404421 has 36 divisors (see below), whose sum is σ = 1382954976. Its totient is φ = 495573120.

The previous prime is 879404387. The next prime is 879404423. The reversal of 879404421 is 124404978.

It is not a de Polignac number, because 879404421 - 2⁷ = 879404293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 879404421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879404423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3648861 + ... + 3649101.

It is an arithmetic number, because the mean of its divisors is an integer number (38415416).

Almost surely, 2^879404421 is an apocalyptic number.

It is an amenable number.

879404421 is a deficient number, since it is larger than the sum of its proper divisors (503550555).

879404421 is a wasteful number, since it uses less digits than its factorization.

879404421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 879404421 is about 29654.7537673136. The cubic root of 879404421 is about 958.0677355738.

The spelling of 879404421 in words is "eight hundred seventy-nine million, four hundred four thousand, four hundred twenty-one".