79408009 has 4 divisors (see below), whose sum is σ = 80364816. Its totient is φ = 78451204.

The previous prime is 79407967. The next prime is 79408027. The reversal of 79408009 is 90080497.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79408009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79408079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478279 + ... + 478444.

It is an arithmetic number, because the mean of its divisors is an integer number (20091204).

Almost surely, 2^79408009 is an apocalyptic number.

It is an amenable number.

79408009 is a deficient number, since it is larger than the sum of its proper divisors (956807).

79408009 is an equidigital number, since it uses as much as digits as its factorization.

79408009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956806.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 79408009 is about 8911.1171577979. The cubic root of 79408009 is about 429.8214672585.

The spelling of 79408009 in words is "seventy-nine million, four hundred eight thousand, nine".