12577969 has 2 divisors, whose sum is σ = 12577970. Its totient is φ = 12577968.

The previous prime is 12577963. The next prime is 12577991. The reversal of 12577969 is 96977521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12510369 + 67600 = 3537^2 + 260^2 .

It is an emirp because it is prime and its reverse (96977521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12577969 - 2⁵ = 12577937 is a prime.

It is a super-2 number, since 2×12577969² = 316410608329922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12577963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6288984 + 6288985.

It is an arithmetic number, because the mean of its divisors is an integer number (6288985).

Almost surely, 2^12577969 is an apocalyptic number.

It is an amenable number.

12577969 is a deficient number, since it is larger than the sum of its proper divisors (1).

12577969 is an equidigital number, since it uses as much as digits as its factorization.

12577969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 46.

The square root of 12577969 is about 3546.5432465994. The cubic root of 12577969 is about 232.5609752587.

The spelling of 12577969 in words is "twelve million, five hundred seventy-seven thousand, nine hundred sixty-nine".