11996531 has 2 divisors, whose sum is σ = 11996532. Its totient is φ = 11996530.

The previous prime is 11996507. The next prime is 11996533. The reversal of 11996531 is 13569911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11996531 - 2¹⁰ = 11995507 is a prime.

It is a super-2 number, since 2×11996531² = 287833512067922, which contains 22 as substring.

Together with 11996533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11996491 and 11996500.

It is not a weakly prime, because it can be changed into another prime (11996533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5998265 + 5998266.

It is an arithmetic number, because the mean of its divisors is an integer number (5998266).

Almost surely, 2^11996531 is an apocalyptic number.

11996531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11996531 is an equidigital number, since it uses as much as digits as its factorization.

11996531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 35.

The square root of 11996531 is about 3463.6008719251. The cubic root of 11996531 is about 228.9207851972.

The spelling of 11996531 in words is "eleven million, nine hundred ninety-six thousand, five hundred thirty-one".