23618641 has 2 divisors, whose sum is σ = 23618642. Its totient is φ = 23618640.

The previous prime is 23618633. The next prime is 23618659. The reversal of 23618641 is 14681632.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23078416 + 540225 = 4804^2 + 735^2 .

It is a cyclic number.

It is not a de Polignac number, because 23618641 - 2³ = 23618633 is a prime.

It is not a weakly prime, because it can be changed into another prime (23618671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11809320 + 11809321.

It is an arithmetic number, because the mean of its divisors is an integer number (11809321).

Almost surely, 2^23618641 is an apocalyptic number.

It is an amenable number.

23618641 is a deficient number, since it is larger than the sum of its proper divisors (1).

23618641 is an equidigital number, since it uses as much as digits as its factorization.

23618641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 31.

The square root of 23618641 is about 4859.9013364471. The cubic root of 23618641 is about 286.9139304932.

The spelling of 23618641 in words is "twenty-three million, six hundred eighteen thousand, six hundred forty-one".