79447393 has 4 divisors (see below), whose sum is σ = 80190000. Its totient is φ = 78704788.

The previous prime is 79447373. The next prime is 79447397. The reversal of 79447393 is 39374497.

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-79447393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79447397) 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, 371143 + ... + 371356.

It is an arithmetic number, because the mean of its divisors is an integer number (20047500).

Almost surely, 2^79447393 is an apocalyptic number.

It is an amenable number.

79447393 is a deficient number, since it is larger than the sum of its proper divisors (742607).

79447393 is a wasteful number, since it uses less digits than its factorization.

79447393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742606.

The product of its digits is 571536, while the sum is 46.

The square root of 79447393 is about 8913.3267078011. The cubic root of 79447393 is about 429.8925150493.

The spelling of 79447393 in words is "seventy-nine million, four hundred forty-seven thousand, three hundred ninety-three".