11997577 has 2 divisors, whose sum is σ = 11997578. Its totient is φ = 11997576.

The previous prime is 11997553. The next prime is 11997593. The reversal of 11997577 is 77579911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11451456 + 546121 = 3384^2 + 739^2 .

It is an emirp because it is prime and its reverse (77579911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11997577 - 2⁷ = 11997449 is a prime.

It is not a weakly prime, because it can be changed into another prime (11997547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5998788 + 5998789.

It is an arithmetic number, because the mean of its divisors is an integer number (5998789).

Almost surely, 2^11997577 is an apocalyptic number.

It is an amenable number.

11997577 is a deficient number, since it is larger than the sum of its proper divisors (1).

11997577 is an equidigital number, since it uses as much as digits as its factorization.

11997577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138915, while the sum is 46.

The square root of 11997577 is about 3463.7518675563. The cubic root of 11997577 is about 228.9274383478.

The spelling of 11997577 in words is "eleven million, nine hundred ninety-seven thousand, five hundred seventy-seven".