79400505 has 16 divisors (see below), whose sum is σ = 128208960. Its totient is φ = 41957568.

The previous prime is 79400501. The next prime is 79400533. The reversal of 79400505 is 50500497.

It is not a de Polignac number, because 79400505 - 2² = 79400501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79400501) 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, 22647 + ... + 25916.

It is an arithmetic number, because the mean of its divisors is an integer number (8013060).

Almost surely, 2^79400505 is an apocalyptic number.

It is an amenable number.

79400505 is a deficient number, since it is larger than the sum of its proper divisors (48808455).

79400505 is a wasteful number, since it uses less digits than its factorization.

79400505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48680.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 79400505 is about 8910.6961007544. The cubic root of 79400505 is about 429.8079275584.

The spelling of 79400505 in words is "seventy-nine million, four hundred thousand, five hundred five".