79897123 has 2 divisors, whose sum is σ = 79897124. Its totient is φ = 79897122.

The previous prime is 79897079. The next prime is 79897159. The reversal of 79897123 is 32179897.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79897123 is a prime.

It is not a weakly prime, because it can be changed into another prime (79897163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39948561 + 39948562.

It is an arithmetic number, because the mean of its divisors is an integer number (39948562).

Almost surely, 2^79897123 is an apocalyptic number.

79897123 is a deficient number, since it is larger than the sum of its proper divisors (1).

79897123 is an equidigital number, since it uses as much as digits as its factorization.

79897123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 79897123 is about 8938.5190607841. The cubic root of 79897123 is about 430.7021572954.

The spelling of 79897123 in words is "seventy-nine million, eight hundred ninety-seven thousand, one hundred twenty-three".