79634991 has 16 divisors (see below), whose sum is σ = 108540000. Its totient is φ = 51916800.

The previous prime is 79634983. The next prime is 79634999. The reversal of 79634991 is 19943697.

It is an interprime number because it is at equal distance from previous prime (79634983) and next prime (79634999).

It is not a de Polignac number, because 79634991 - 2³ = 79634983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79634991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79634999) 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, 63135 + ... + 64383.

It is an arithmetic number, because the mean of its divisors is an integer number (6783750).

Almost surely, 2^79634991 is an apocalyptic number.

79634991 is a deficient number, since it is larger than the sum of its proper divisors (28905009).

79634991 is a wasteful number, since it uses less digits than its factorization.

79634991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706.

The product of its digits is 367416, while the sum is 48.

The square root of 79634991 is about 8923.8439587433. The cubic root of 79634991 is about 430.2306154337.

The spelling of 79634991 in words is "seventy-nine million, six hundred thirty-four thousand, nine hundred ninety-one".