79455917 has 2 divisors, whose sum is σ = 79455918. Its totient is φ = 79455916.

The previous prime is 79455839. The next prime is 79455941. The reversal of 79455917 is 71955497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46977316 + 32478601 = 6854^2 + 5699^2 .

It is a cyclic number.

It is not a de Polignac number, because 79455917 - 2⁸ = 79455661 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 (79455947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39727958 + 39727959.

It is an arithmetic number, because the mean of its divisors is an integer number (39727959).

Almost surely, 2^79455917 is an apocalyptic number.

It is an amenable number.

79455917 is a deficient number, since it is larger than the sum of its proper divisors (1).

79455917 is an equidigital number, since it uses as much as digits as its factorization.

79455917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 47.

The square root of 79455917 is about 8913.8048553914. The cubic root of 79455917 is about 429.9078890497.

The spelling of 79455917 in words is "seventy-nine million, four hundred fifty-five thousand, nine hundred seventeen".