79613893 has 2 divisors, whose sum is σ = 79613894. Its totient is φ = 79613892.

The previous prime is 79613867. The next prime is 79613969. The reversal of 79613893 is 39831697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51236964 + 28376929 = 7158^2 + 5327^2 .

It is a cyclic number.

It is not a de Polignac number, because 79613893 - 2⁵ = 79613861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79613803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39806946 + 39806947.

It is an arithmetic number, because the mean of its divisors is an integer number (39806947).

Almost surely, 2^79613893 is an apocalyptic number.

It is an amenable number.

79613893 is a deficient number, since it is larger than the sum of its proper divisors (1).

79613893 is an equidigital number, since it uses as much as digits as its factorization.

79613893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 79613893 is about 8922.6617665358. The cubic root of 79613893 is about 430.1926178686.

The spelling of 79613893 in words is "seventy-nine million, six hundred thirteen thousand, eight hundred ninety-three".