79159901 has 2 divisors, whose sum is σ = 79159902. Its totient is φ = 79159900.

The previous prime is 79159877. The next prime is 79159921. The reversal of 79159901 is 10995197.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76912900 + 2247001 = 8770^2 + 1499^2 .

It is an emirp because it is prime and its reverse (10995197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79159901 - 2¹⁸ = 78897757 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 (79159921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39579950 + 39579951.

It is an arithmetic number, because the mean of its divisors is an integer number (39579951).

Almost surely, 2^79159901 is an apocalyptic number.

It is an amenable number.

79159901 is a deficient number, since it is larger than the sum of its proper divisors (1).

79159901 is an equidigital number, since it uses as much as digits as its factorization.

79159901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 79159901 is about 8897.1850042584. The cubic root of 79159901 is about 429.3733453546.

The spelling of 79159901 in words is "seventy-nine million, one hundred fifty-nine thousand, nine hundred one".