79403421 has 16 divisors (see below), whose sum is σ = 110597760. Its totient is φ = 50608320.

The previous prime is 79403407. The next prime is 79403437. The reversal of 79403421 is 12430497.

It is a happy number.

It is not a de Polignac number, because 79403421 - 2⁹ = 79402909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79403461) 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, 4531 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (6912360).

Almost surely, 2^79403421 is an apocalyptic number.

It is an amenable number.

79403421 is a deficient number, since it is larger than the sum of its proper divisors (31194339).

79403421 is a wasteful number, since it uses less digits than its factorization.

79403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8996.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 79403421 is about 8910.8597228326. The cubic root of 79403421 is about 429.8131890890.

The spelling of 79403421 in words is "seventy-nine million, four hundred three thousand, four hundred twenty-one".