79810901 has 2 divisors, whose sum is σ = 79810902. Its totient is φ = 79810900.

The previous prime is 79810877. The next prime is 79810919. The reversal of 79810901 is 10901897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68046001 + 11764900 = 8249^2 + 3430^2 .

It is a cyclic number.

It is not a de Polignac number, because 79810901 - 2⁶ = 79810837 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79810201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39905450 + 39905451.

It is an arithmetic number, because the mean of its divisors is an integer number (39905451).

Almost surely, 2^79810901 is an apocalyptic number.

It is an amenable number.

79810901 is a deficient number, since it is larger than the sum of its proper divisors (1).

79810901 is an equidigital number, since it uses as much as digits as its factorization.

79810901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 79810901 is about 8933.6947004025. The cubic root of 79810901 is about 430.5471689528.

The spelling of 79810901 in words is "seventy-nine million, eight hundred ten thousand, nine hundred one".