79417889 has 2 divisors, whose sum is σ = 79417890. Its totient is φ = 79417888.

The previous prime is 79417867. The next prime is 79417957. The reversal of 79417889 is 98871497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39790864 + 39627025 = 6308^2 + 6295^2 .

It is a cyclic number.

It is not a de Polignac number, because 79417889 - 2⁸ = 79417633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 79417889.

It is not a weakly prime, because it can be changed into another prime (79417859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39708944 + 39708945.

It is an arithmetic number, because the mean of its divisors is an integer number (39708945).

Almost surely, 2^79417889 is an apocalyptic number.

It is an amenable number.

79417889 is a deficient number, since it is larger than the sum of its proper divisors (1).

79417889 is an equidigital number, since it uses as much as digits as its factorization.

79417889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 53.

The square root of 79417889 is about 8911.6715042690. The cubic root of 79417889 is about 429.8392927484.

The spelling of 79417889 in words is "seventy-nine million, four hundred seventeen thousand, eight hundred eighty-nine".