79440863 has 8 divisors (see below), whose sum is σ = 81118800. Its totient is φ = 77779008.

The previous prime is 79440859. The next prime is 79440917. The reversal of 79440863 is 36804497.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79440863 - 2² = 79440859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79440863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79440833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6233 + ... + 14061.

It is an arithmetic number, because the mean of its divisors is an integer number (10139850).

Almost surely, 2^79440863 is an apocalyptic number.

79440863 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

79440863 is a deficient number, since it is larger than the sum of its proper divisors (1677937).

79440863 is a wasteful number, since it uses less digits than its factorization.

79440863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8041.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 79440863 is about 8912.9603948408. The cubic root of 79440863 is about 429.8807367101.

The spelling of 79440863 in words is "seventy-nine million, four hundred forty thousand, eight hundred sixty-three".