79807901 has 2 divisors, whose sum is σ = 79807902. Its totient is φ = 79807900.

The previous prime is 79807883. The next prime is 79807939. The reversal of 79807901 is 10970897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79744900 + 63001 = 8930^2 + 251^2 .

It is a cyclic number.

It is not a de Polignac number, because 79807901 - 2¹⁸ = 79545757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79807501) 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, 39903950 + 39903951.

It is an arithmetic number, because the mean of its divisors is an integer number (39903951).

Almost surely, 2^79807901 is an apocalyptic number.

It is an amenable number.

79807901 is a deficient number, since it is larger than the sum of its proper divisors (1).

79807901 is an equidigital number, since it uses as much as digits as its factorization.

79807901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 79807901 is about 8933.5267951689. The cubic root of 79807901 is about 430.5417742942.

It can be divided in two parts, 79807 and 901, that added together give a palindrome (80708).

The spelling of 79807901 in words is "seventy-nine million, eight hundred seven thousand, nine hundred one".