79965878 has 4 divisors (see below), whose sum is σ = 119948820. Its totient is φ = 39982938.

The previous prime is 79965863. The next prime is 79965911. The reversal of 79965878 is 87856997.

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

It is a congruent 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 as a sum of consecutive naturals, namely, 19991468 + ... + 19991471.

It is an arithmetic number, because the mean of its divisors is an integer number (29987205).

Almost surely, 2^79965878 is an apocalyptic number.

79965878 is a deficient number, since it is larger than the sum of its proper divisors (39982942).

79965878 is a wasteful number, since it uses less digits than its factorization.

79965878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39982941.

The product of its digits is 7620480, while the sum is 59.

The square root of 79965878 is about 8942.3642287708. The cubic root of 79965878 is about 430.8256679441.

The spelling of 79965878 in words is "seventy-nine million, nine hundred sixty-five thousand, eight hundred seventy-eight".