11923831 has 2 divisors, whose sum is σ = 11923832. Its totient is φ = 11923830.

The previous prime is 11923829. The next prime is 11923861. The reversal of 11923831 is 13832911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11923831 - 2¹ = 11923829 is a prime.

It is a super-2 number, since 2×11923831² = 284355491433122, which contains 22 as substring.

Together with 11923829, 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 11923831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11923861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5961915 + 5961916.

It is an arithmetic number, because the mean of its divisors is an integer number (5961916).

Almost surely, 2^11923831 is an apocalyptic number.

11923831 is a deficient number, since it is larger than the sum of its proper divisors (1).

11923831 is an equidigital number, since it uses as much as digits as its factorization.

11923831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 11923831 is about 3453.0900654341. The cubic root of 11923831 is about 228.4574214372.

The spelling of 11923831 in words is "eleven million, nine hundred twenty-three thousand, eight hundred thirty-one".