79631843 has 2 divisors, whose sum is σ = 79631844. Its totient is φ = 79631842.

The previous prime is 79631821. The next prime is 79631863. The reversal of 79631843 is 34813697.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79631843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79631843.

It is not a weakly prime, because it can be changed into another prime (79631863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39815921 + 39815922.

It is an arithmetic number, because the mean of its divisors is an integer number (39815922).

Almost surely, 2^79631843 is an apocalyptic number.

79631843 is a deficient number, since it is larger than the sum of its proper divisors (1).

79631843 is an equidigital number, since it uses as much as digits as its factorization.

79631843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 79631843 is about 8923.6675756104. The cubic root of 79631843 is about 430.2249463017.

The spelling of 79631843 in words is "seventy-nine million, six hundred thirty-one thousand, eight hundred forty-three".