79905501 has 16 divisors (see below), whose sum is σ = 127485120. Its totient is φ = 49172400.

The previous prime is 79905461. The next prime is 79905517. The reversal of 79905501 is 10550997.

It is a happy number.

It is not a de Polignac number, because 79905501 - 2⁷ = 79905373 is a prime.

It is a super-2 number, since 2×79905501² = 12769778180122002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79905901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113475 + ... + 114176.

It is an arithmetic number, because the mean of its divisors is an integer number (7967820).

Almost surely, 2^79905501 is an apocalyptic number.

It is an amenable number.

79905501 is a deficient number, since it is larger than the sum of its proper divisors (47579619).

79905501 is a wasteful number, since it uses less digits than its factorization.

79905501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227673 (or 227667 counting only the distinct ones).

The product of its (nonzero) digits is 14175, while the sum is 36.

The square root of 79905501 is about 8938.9876943645. The cubic root of 79905501 is about 430.7172112231.

The spelling of 79905501 in words is "seventy-nine million, nine hundred five thousand, five hundred one".