79421975 has 6 divisors (see below), whose sum is σ = 98483280. Its totient is φ = 63537560.

The previous prime is 79421971. The next prime is 79421983. The reversal of 79421975 is 57912497.

It is not a de Polignac number, because 79421975 - 2² = 79421971 is a prime.

It is a super-2 number, since 2×79421975² = 12615700225801250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79421971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1588415 + ... + 1588464.

It is an arithmetic number, because the mean of its divisors is an integer number (16413880).

Almost surely, 2^79421975 is an apocalyptic number.

79421975 is a deficient number, since it is larger than the sum of its proper divisors (19061305).

79421975 is a wasteful number, since it uses less digits than its factorization.

79421975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176889 (or 3176884 counting only the distinct ones).

The product of its digits is 158760, while the sum is 44.

The square root of 79421975 is about 8911.9007512427. The cubic root of 79421975 is about 429.8466642750.

The spelling of 79421975 in words is "seventy-nine million, four hundred twenty-one thousand, nine hundred seventy-five".