23611391 has 2 divisors, whose sum is σ = 23611392. Its totient is φ = 23611390.

The previous prime is 23611381. The next prime is 23611397. The reversal of 23611391 is 19311632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23611391 - 2¹⁴ = 23595007 is a prime.

It is a Sophie Germain prime.

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 23611391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23611397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11805695 + 11805696.

It is an arithmetic number, because the mean of its divisors is an integer number (11805696).

Almost surely, 2^23611391 is an apocalyptic number.

23611391 is a deficient number, since it is larger than the sum of its proper divisors (1).

23611391 is an equidigital number, since it uses as much as digits as its factorization.

23611391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 26.

The square root of 23611391 is about 4859.1553792815. The cubic root of 23611391 is about 286.8845703666.

The spelling of 23611391 in words is "twenty-three million, six hundred eleven thousand, three hundred ninety-one".