9997579 has 2 divisors, whose sum is σ = 9997580. Its totient is φ = 9997578.

The previous prime is 9997577. The next prime is 9997583. The reversal of 9997579 is 9757999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9997579 - 2¹ = 9997577 is a prime.

It is a super-2 number, since 2×9997579² = 199903171722482, which contains 22 as substring.

Together with 9997577, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9997573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998789 + 4998790.

It is an arithmetic number, because the mean of its divisors is an integer number (4998790).

Almost surely, 2^9997579 is an apocalyptic number.

9997579 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997579 is an equidigital number, since it uses as much as digits as its factorization.

9997579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1607445, while the sum is 55.

The square root of 9997579 is about 3161.8948432862. The cubic root of 9997579 is about 215.4260813120.

The spelling of 9997579 in words is "nine million, nine hundred ninety-seven thousand, five hundred seventy-nine".