79971601 has 2 divisors, whose sum is σ = 79971602. Its totient is φ = 79971600.

The previous prime is 79971557. The next prime is 79971611. The reversal of 79971601 is 10617997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62964225 + 17007376 = 7935^2 + 4124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79971601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79971611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39985800 + 39985801.

It is an arithmetic number, because the mean of its divisors is an integer number (39985801).

Almost surely, 2^79971601 is an apocalyptic number.

It is an amenable number.

79971601 is a deficient number, since it is larger than the sum of its proper divisors (1).

79971601 is an equidigital number, since it uses as much as digits as its factorization.

79971601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814, while the sum is 40.

The square root of 79971601 is about 8942.6842167215. The cubic root of 79971601 is about 430.8359454797.

The spelling of 79971601 in words is "seventy-nine million, nine hundred seventy-one thousand, six hundred one".