79894779 has 4 divisors (see below), whose sum is σ = 106526376. Its totient is φ = 53263184.

The previous prime is 79894757. The next prime is 79894807. The reversal of 79894779 is 97749897.

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 79894779 - 2⁸ = 79894523 is a prime.

It is a super-2 number, since 2×79894779² = 12766351422917682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79894379) 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, 13315794 + ... + 13315799.

It is an arithmetic number, because the mean of its divisors is an integer number (26631594).

Almost surely, 2^79894779 is an apocalyptic number.

79894779 is a deficient number, since it is larger than the sum of its proper divisors (26631597).

79894779 is a wasteful number, since it uses less digits than its factorization.

79894779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26631596.

The product of its digits is 8001504, while the sum is 60.

The square root of 79894779 is about 8938.3879419054. The cubic root of 79894779 is about 430.6979453134.

The spelling of 79894779 in words is "seventy-nine million, eight hundred ninety-four thousand, seven hundred seventy-nine".