79407157 has 2 divisors, whose sum is σ = 79407158. Its totient is φ = 79407156.

The previous prime is 79407149. The next prime is 79407193. The reversal of 79407157 is 75170497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45778756 + 33628401 = 6766^2 + 5799^2 .

It is an emirp because it is prime and its reverse (75170497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79407157 - 2³ = 79407149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79407457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39703578 + 39703579.

It is an arithmetic number, because the mean of its divisors is an integer number (39703579).

Almost surely, 2^79407157 is an apocalyptic number.

It is an amenable number.

79407157 is a deficient number, since it is larger than the sum of its proper divisors (1).

79407157 is an equidigital number, since it uses as much as digits as its factorization.

79407157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 79407157 is about 8911.0693522158. The cubic root of 79407157 is about 429.8199300114.

The spelling of 79407157 in words is "seventy-nine million, four hundred seven thousand, one hundred fifty-seven".