79925017 has 2 divisors, whose sum is σ = 79925018. Its totient is φ = 79925016.

The previous prime is 79925009. The next prime is 79925057. The reversal of 79925017 is 71052997.

It is an a-pointer prime, because the next prime (79925057) can be obtained adding 79925017 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71978256 + 7946761 = 8484^2 + 2819^2 .

It is an emirp because it is prime and its reverse (71052997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79925017 - 2³ = 79925009 is a prime.

It is not a weakly prime, because it can be changed into another prime (79925057) 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, 39962508 + 39962509.

It is an arithmetic number, because the mean of its divisors is an integer number (39962509).

Almost surely, 2^79925017 is an apocalyptic number.

It is an amenable number.

79925017 is a deficient number, since it is larger than the sum of its proper divisors (1).

79925017 is an equidigital number, since it uses as much as digits as its factorization.

79925017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 79925017 is about 8940.0792502080. The cubic root of 79925017 is about 430.7522742778.

The spelling of 79925017 in words is "seventy-nine million, nine hundred twenty-five thousand, seventeen".