11529431 has 2 divisors, whose sum is σ = 11529432. Its totient is φ = 11529430.

The previous prime is 11529421. The next prime is 11529433. The reversal of 11529431 is 13492511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11529431 is a prime.

It is a super-2 number, since 2×11529431² = 265855558367522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 11529433, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11529431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11529433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5764715 + 5764716.

It is an arithmetic number, because the mean of its divisors is an integer number (5764716).

Almost surely, 2^11529431 is an apocalyptic number.

11529431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11529431 is an equidigital number, since it uses as much as digits as its factorization.

11529431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 11529431 is about 3395.5015829771. The cubic root of 11529431 is about 225.9102614456.

The spelling of 11529431 in words is "eleven million, five hundred twenty-nine thousand, four hundred thirty-one".