79400407 has 4 divisors (see below), whose sum is σ = 79709616. Its totient is φ = 79091200.

The previous prime is 79400369. The next prime is 79400429. The reversal of 79400407 is 70400497.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79400407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79400707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154219 + ... + 154732.

It is an arithmetic number, because the mean of its divisors is an integer number (19927404).

Almost surely, 2^79400407 is an apocalyptic number.

79400407 is a deficient number, since it is larger than the sum of its proper divisors (309209).

79400407 is a wasteful number, since it uses less digits than its factorization.

79400407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309208.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 79400407 is about 8910.6906017435. The cubic root of 79400407 is about 429.8077507283.

The spelling of 79400407 in words is "seventy-nine million, four hundred thousand, four hundred seven".