7997579 has 2 divisors, whose sum is σ = 7997580. Its totient is φ = 7997578.

The previous prime is 7997557. The next prime is 7997581. The reversal of 7997579 is 9757997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7997579 - 2⁸ = 7997323 is a prime.

It is a super-2 number, since 2×7997579² = 127922539722482, which contains 22 as substring.

Together with 7997581, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7997579.

It is not a weakly prime, because it can be changed into another prime (7997519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3998789 + 3998790.

It is an arithmetic number, because the mean of its divisors is an integer number (3998790).

Almost surely, 2^7997579 is an apocalyptic number.

7997579 is a deficient number, since it is larger than the sum of its proper divisors (1).

7997579 is an equidigital number, since it uses as much as digits as its factorization.

7997579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1250235, while the sum is 53.

The square root of 7997579 is about 2827.9991159829. Note that the first 3 decimals coincide. The cubic root of 7997579 is about 199.9798229645.

The spelling of 7997579 in words is "seven million, nine hundred ninety-seven thousand, five hundred seventy-nine".