23281969 has 2 divisors, whose sum is σ = 23281970. Its totient is φ = 23281968.

The previous prime is 23281949. The next prime is 23281981. The reversal of 23281969 is 96918232.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11992369 + 11289600 = 3463^2 + 3360^2 .

It is a cyclic number.

It is not a de Polignac number, because 23281969 - 2⁹ = 23281457 is a prime.

It is a super-2 number, since 2×23281969² = 1084100161033922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23281919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11640984 + 11640985.

It is an arithmetic number, because the mean of its divisors is an integer number (11640985).

Almost surely, 2^23281969 is an apocalyptic number.

It is an amenable number.

23281969 is a deficient number, since it is larger than the sum of its proper divisors (1).

23281969 is an equidigital number, since it uses as much as digits as its factorization.

23281969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 40.

The square root of 23281969 is about 4825.1392726014. The cubic root of 23281969 is about 285.5441292434.

The spelling of 23281969 in words is "twenty-three million, two hundred eighty-one thousand, nine hundred sixty-nine".