79207157 has 2 divisors, whose sum is σ = 79207158. Its totient is φ = 79207156.

The previous prime is 79207153. The next prime is 79207159. The reversal of 79207157 is 75170297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77545636 + 1661521 = 8806^2 + 1289^2 .

It is a cyclic number.

It is not a de Polignac number, because 79207157 - 2² = 79207153 is a prime.

Together with 79207159, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79207157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79207153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39603578 + 39603579.

It is an arithmetic number, because the mean of its divisors is an integer number (39603579).

Almost surely, 2^79207157 is an apocalyptic number.

It is an amenable number.

79207157 is a deficient number, since it is larger than the sum of its proper divisors (1).

79207157 is an equidigital number, since it uses as much as digits as its factorization.

79207157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30870, while the sum is 38.

The square root of 79207157 is about 8899.8402794657. The cubic root of 79207157 is about 429.4587692047.

The spelling of 79207157 in words is "seventy-nine million, two hundred seven thousand, one hundred fifty-seven".