79574389 has 2 divisors, whose sum is σ = 79574390. Its totient is φ = 79574388.

The previous prime is 79574377. The next prime is 79574419. The reversal of 79574389 is 98347597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41344900 + 38229489 = 6430^2 + 6183^2 .

It is an emirp because it is prime and its reverse (98347597) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79574389 - 2²³ = 71185781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79574689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39787194 + 39787195.

It is an arithmetic number, because the mean of its divisors is an integer number (39787195).

Almost surely, 2^79574389 is an apocalyptic number.

It is an amenable number.

79574389 is a deficient number, since it is larger than the sum of its proper divisors (1).

79574389 is an equidigital number, since it uses as much as digits as its factorization.

79574389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 52.

The square root of 79574389 is about 8920.4478026610. The cubic root of 79574389 is about 430.1214529829.

The spelling of 79574389 in words is "seventy-nine million, five hundred seventy-four thousand, three hundred eighty-nine".