23669621 has 2 divisors, whose sum is σ = 23669622. Its totient is φ = 23669620.

The previous prime is 23669617. The next prime is 23669629. The reversal of 23669621 is 12696632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23571025 + 98596 = 4855^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 23669621 - 2² = 23669617 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23669629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11834810 + 11834811.

It is an arithmetic number, because the mean of its divisors is an integer number (11834811).

Almost surely, 2^23669621 is an apocalyptic number.

It is an amenable number.

23669621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23669621 is an equidigital number, since it uses as much as digits as its factorization.

23669621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 23669621 is about 4865.1434716769. The cubic root of 23669621 is about 287.1202133316.

The spelling of 23669621 in words is "twenty-three million, six hundred sixty-nine thousand, six hundred twenty-one".