79913123 has 2 divisors, whose sum is σ = 79913124. Its totient is φ = 79913122.

The previous prime is 79913101. The next prime is 79913131. The reversal of 79913123 is 32131997.

It is a strong prime.

It is an emirp because it is prime and its reverse (32131997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79913123 - 2¹⁸ = 79650979 is a prime.

It is a super-2 number, since 2×79913123² = 12772214455226258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79913153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39956561 + 39956562.

It is an arithmetic number, because the mean of its divisors is an integer number (39956562).

Almost surely, 2^79913123 is an apocalyptic number.

79913123 is a deficient number, since it is larger than the sum of its proper divisors (1).

79913123 is an equidigital number, since it uses as much as digits as its factorization.

79913123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 35.

The square root of 79913123 is about 8939.4140188270. The cubic root of 79913123 is about 430.7309058256.

The spelling of 79913123 in words is "seventy-nine million, nine hundred thirteen thousand, one hundred twenty-three".