11992511 has 2 divisors, whose sum is σ = 11992512. Its totient is φ = 11992510.

The previous prime is 11992493. The next prime is 11992559. The reversal of 11992511 is 11529911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11992511 - 2⁶ = 11992447 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11992111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5996255 + 5996256.

It is an arithmetic number, because the mean of its divisors is an integer number (5996256).

Almost surely, 2^11992511 is an apocalyptic number.

11992511 is a deficient number, since it is larger than the sum of its proper divisors (1).

11992511 is an equidigital number, since it uses as much as digits as its factorization.

11992511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 810, while the sum is 29.

The square root of 11992511 is about 3463.0205023938. The cubic root of 11992511 is about 228.8952121276.

The spelling of 11992511 in words is "eleven million, nine hundred ninety-two thousand, five hundred eleven".