79797838 has 4 divisors (see below), whose sum is σ = 119696760. Its totient is φ = 39898918.

The previous prime is 79797829. The next prime is 79797859. The reversal of 79797838 is 83879797.

It is a happy number.

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

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 19949458 + ... + 19949461.

It is an arithmetic number, because the mean of its divisors is an integer number (29924190).

Almost surely, 2^79797838 is an apocalyptic number.

79797838 is a deficient number, since it is larger than the sum of its proper divisors (39898922).

79797838 is a wasteful number, since it uses less digits than its factorization.

79797838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39898921.

The product of its digits is 5334336, while the sum is 58.

The square root of 79797838 is about 8932.9635619989. The cubic root of 79797838 is about 430.5236778236.

The spelling of 79797838 in words is "seventy-nine million, seven hundred ninety-seven thousand, eight hundred thirty-eight".