79969798 has 4 divisors (see below), whose sum is σ = 119954700. Its totient is φ = 39984898.

The previous prime is 79969789. The next prime is 79969811. The reversal of 79969798 is 89796997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89796997 = 59 ⋅1521983.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19992448 + ... + 19992451.

It is an arithmetic number, because the mean of its divisors is an integer number (29988675).

Almost surely, 2^79969798 is an apocalyptic number.

79969798 is a deficient number, since it is larger than the sum of its proper divisors (39984902).

79969798 is a wasteful number, since it uses less digits than its factorization.

79969798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39984901.

The product of its digits is 15431472, while the sum is 64.

The square root of 79969798 is about 8942.5834074947. The cubic root of 79969798 is about 430.8327076509.

The spelling of 79969798 in words is "seventy-nine million, nine hundred sixty-nine thousand, seven hundred ninety-eight".