79400465 has 4 divisors (see below), whose sum is σ = 95280564. Its totient is φ = 63520368.

The previous prime is 79400459. The next prime is 79400471. The reversal of 79400465 is 56400497.

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

It is an interprime number because it is at equal distance from previous prime (79400459) and next prime (79400471).

It can be written as a sum of positive squares in 2 ways, for example, as 56370064 + 23030401 = 7508^2 + 4799^2 .

It is a cyclic number.

It is not a de Polignac number, because 79400465 - 2¹⁸ = 79138321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7940042 + ... + 7940051.

It is an arithmetic number, because the mean of its divisors is an integer number (23820141).

Almost surely, 2^79400465 is an apocalyptic number.

It is an amenable number.

79400465 is a deficient number, since it is larger than the sum of its proper divisors (15880099).

79400465 is a wasteful number, since it uses less digits than its factorization.

79400465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15880098.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 79400465 is about 8910.6938562606. The cubic root of 79400465 is about 429.8078553829.

The spelling of 79400465 in words is "seventy-nine million, four hundred thousand, four hundred sixty-five".