79251251 has 2 divisors, whose sum is σ = 79251252. Its totient is φ = 79251250.

The previous prime is 79251239. The next prime is 79251253. The reversal of 79251251 is 15215297.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (15215297) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79251251 is a prime.

Together with 79251253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79251253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39625625 + 39625626.

It is an arithmetic number, because the mean of its divisors is an integer number (39625626).

Almost surely, 2^79251251 is an apocalyptic number.

79251251 is a deficient number, since it is larger than the sum of its proper divisors (1).

79251251 is an equidigital number, since it uses as much as digits as its factorization.

79251251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 32.

The square root of 79251251 is about 8902.3171702653. The cubic root of 79251251 is about 429.5384465252.

The spelling of 79251251 in words is "seventy-nine million, two hundred fifty-one thousand, two hundred fifty-one".