79621407 has 16 divisors (see below), whose sum is σ = 118863360. Its totient is φ = 52673400.

The previous prime is 79621403. The next prime is 79621411. The reversal of 79621407 is 70412697.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (79621403) and next prime (79621411).

It is not a de Polignac number, because 79621407 - 2² = 79621403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79621403) 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, 7719 + ... + 14792.

It is an arithmetic number, because the mean of its divisors is an integer number (7428960).

Almost surely, 2^79621407 is an apocalyptic number.

79621407 is a deficient number, since it is larger than the sum of its proper divisors (39241953).

79621407 is a wasteful number, since it uses less digits than its factorization.

79621407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22651 (or 22645 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 79621407 is about 8923.0828192951. The cubic root of 79621407 is about 430.2061513761.

The spelling of 79621407 in words is "seventy-nine million, six hundred twenty-one thousand, four hundred seven".