12197579 has 4 divisors (see below), whose sum is σ = 12427776. Its totient is φ = 11967384.

The previous prime is 12197557. The next prime is 12197593. The reversal of 12197579 is 97579121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97579121 = 1453 ⋅67157.

It is a cyclic number.

It is not a de Polignac number, because 12197579 - 2⁸ = 12197323 is a prime.

It is a super-2 number, since 2×12197579² = 297561866922482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12197519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115019 + ... + 115124.

It is an arithmetic number, because the mean of its divisors is an integer number (3106944).

Almost surely, 2^12197579 is an apocalyptic number.

12197579 is a deficient number, since it is larger than the sum of its proper divisors (230197).

12197579 is an equidigital number, since it uses as much as digits as its factorization.

12197579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230196.

The product of its digits is 39690, while the sum is 41.

The square root of 12197579 is about 3492.5032569777. The cubic root of 12197579 is about 230.1925231122.

The spelling of 12197579 in words is "twelve million, one hundred ninety-seven thousand, five hundred seventy-nine".