79425917 has 2 divisors, whose sum is σ = 79425918. Its totient is φ = 79425916.

The previous prime is 79425883. The next prime is 79425919. The reversal of 79425917 is 71952497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73170916 + 6255001 = 8554^2 + 2501^2 .

It is a cyclic number.

It is not a de Polignac number, because 79425917 - 2¹⁶ = 79360381 is a prime.

Together with 79425919, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4637897 and since 79425917 and 4637897 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79425919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39712958 + 39712959.

It is an arithmetic number, because the mean of its divisors is an integer number (39712959).

Almost surely, 2^79425917 is an apocalyptic number.

It is an amenable number.

79425917 is a deficient number, since it is larger than the sum of its proper divisors (1).

79425917 is an equidigital number, since it uses as much as digits as its factorization.

79425917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 79425917 is about 8912.1219134390. The cubic root of 79425917 is about 429.8537757724.

The spelling of 79425917 in words is "seventy-nine million, four hundred twenty-five thousand, nine hundred seventeen".