79787943 has 16 divisors (see below), whose sum is σ = 123344640. Its totient is φ = 50878872.

The previous prime is 79787933. The next prime is 79787957. The reversal of 79787943 is 34978797.

It is not a de Polignac number, because 79787943 - 2⁹ = 79787431 is a prime.

It is a super-2 number, since 2×79787943² = 12732231696342498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79787943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79787923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63621 + ... + 64862.

It is an arithmetic number, because the mean of its divisors is an integer number (7709040).

Almost surely, 2^79787943 is an apocalyptic number.

79787943 is a deficient number, since it is larger than the sum of its proper divisors (43556697).

79787943 is a wasteful number, since it uses less digits than its factorization.

79787943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128515 (or 128509 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 79787943 is about 8932.4096972765. The cubic root of 79787943 is about 430.5058819869.

It can be divided in two parts, 7978794 and 3, that added together give a palindrome (7978797).

The spelling of 79787943 in words is "seventy-nine million, seven hundred eighty-seven thousand, nine hundred forty-three".