79331579 has 2 divisors, whose sum is σ = 79331580. Its totient is φ = 79331578.

The previous prime is 79331557. The next prime is 79331587. The reversal of 79331579 is 97513397.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79331579 - 2²⁰ = 78283003 is a prime.

It is not a weakly prime, because it can be changed into another prime (79334579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39665789 + 39665790.

It is an arithmetic number, because the mean of its divisors is an integer number (39665790).

Almost surely, 2^79331579 is an apocalyptic number.

79331579 is a deficient number, since it is larger than the sum of its proper divisors (1).

79331579 is an equidigital number, since it uses as much as digits as its factorization.

79331579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 178605, while the sum is 44.

The square root of 79331579 is about 8906.8276619681. The cubic root of 79331579 is about 429.6835223143.

The spelling of 79331579 in words is "seventy-nine million, three hundred thirty-one thousand, five hundred seventy-nine".