79221375 has 32 divisors (see below), whose sum is σ = 146477760. Its totient is φ = 42249600.

The previous prime is 79221323. The next prime is 79221397. The reversal of 79221375 is 57312297.

It is not a de Polignac number, because 79221375 - 2⁸ = 79221119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8362 + ... + 15111.

It is an arithmetic number, because the mean of its divisors is an integer number (4577430).

Almost surely, 2^79221375 is an apocalyptic number.

79221375 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

79221375 is a deficient number, since it is larger than the sum of its proper divisors (67256385).

79221375 is a wasteful number, since it uses less digits than its factorization.

79221375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23497 (or 23481 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 79221375 is about 8900.6390220029. The cubic root of 79221375 is about 429.4844641869.

The spelling of 79221375 in words is "seventy-nine million, two hundred twenty-one thousand, three hundred seventy-five".