11657999 has 2 divisors, whose sum is σ = 11658000. Its totient is φ = 11657998.

The previous prime is 11657993. The next prime is 11658011. The reversal of 11657999 is 99975611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11657999 - 2⁸ = 11657743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11657993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5828999 + 5829000.

It is an arithmetic number, because the mean of its divisors is an integer number (5829000).

Almost surely, 2^11657999 is an apocalyptic number.

11657999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11657999 is an equidigital number, since it uses as much as digits as its factorization.

11657999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153090, while the sum is 47.

The square root of 11657999 is about 3414.3812030879. The cubic root of 11657999 is about 226.7468893759.

The spelling of 11657999 in words is "eleven million, six hundred fifty-seven thousand, nine hundred ninety-nine".