23066921 has 2 divisors, whose sum is σ = 23066922. Its totient is φ = 23066920.

The previous prime is 23066903. The next prime is 23066929. The reversal of 23066921 is 12966032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 3610000 = 4411^2 + 1900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23066921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23066929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11533460 + 11533461.

It is an arithmetic number, because the mean of its divisors is an integer number (11533461).

Almost surely, 2^23066921 is an apocalyptic number.

It is an amenable number.

23066921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23066921 is an equidigital number, since it uses as much as digits as its factorization.

23066921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 23066921 is about 4802.8034521517. The cubic root of 23066921 is about 284.6622489124.

The spelling of 23066921 in words is "twenty-three million, sixty-six thousand, nine hundred twenty-one".