79894015 has 4 divisors (see below), whose sum is σ = 95872824. Its totient is φ = 63915208.

The previous prime is 79893991. The next prime is 79894027. The reversal of 79894015 is 51049897.

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

It is a cyclic number.

It is not a de Polignac number, because 79894015 - 2²³ = 71505407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7989397 + ... + 7989406.

It is an arithmetic number, because the mean of its divisors is an integer number (23968206).

Almost surely, 2^79894015 is an apocalyptic number.

79894015 is a deficient number, since it is larger than the sum of its proper divisors (15978809).

79894015 is a wasteful number, since it uses less digits than its factorization.

79894015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15978808.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 79894015 is about 8938.3452047904. The cubic root of 79894015 is about 430.6965724482.

The spelling of 79894015 in words is "seventy-nine million, eight hundred ninety-four thousand, fifteen".