79412521 has 2 divisors, whose sum is σ = 79412522. Its totient is φ = 79412520.

The previous prime is 79412519. The next prime is 79412549. The reversal of 79412521 is 12521497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 7502121 = 8480^2 + 2739^2 .

It is a cyclic number.

It is not a de Polignac number, because 79412521 - 2¹ = 79412519 is a prime.

Together with 79412519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (79412551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39706260 + 39706261.

It is an arithmetic number, because the mean of its divisors is an integer number (39706261).

Almost surely, 2^79412521 is an apocalyptic number.

It is an amenable number.

79412521 is a deficient number, since it is larger than the sum of its proper divisors (1).

79412521 is an equidigital number, since it uses as much as digits as its factorization.

79412521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 79412521 is about 8911.3703211122. The cubic root of 79412521 is about 429.8296079896.

The spelling of 79412521 in words is "seventy-nine million, four hundred twelve thousand, five hundred twenty-one".