23689121 has 2 divisors, whose sum is σ = 23689122. Its totient is φ = 23689120.

The previous prime is 23689111. The next prime is 23689151. The reversal of 23689121 is 12198632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23658496 + 30625 = 4864^2 + 175^2 .

It is a cyclic number.

It is not a de Polignac number, because 23689121 - 2¹⁰ = 23688097 is a prime.

It is a super-2 number, since 2×23689121² = 1122348907505282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23689111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11844560 + 11844561.

It is an arithmetic number, because the mean of its divisors is an integer number (11844561).

Almost surely, 2^23689121 is an apocalyptic number.

It is an amenable number.

23689121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23689121 is an equidigital number, since it uses as much as digits as its factorization.

23689121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 23689121 is about 4867.1471109881. The cubic root of 23689121 is about 287.1990388065.

The spelling of 23689121 in words is "twenty-three million, six hundred eighty-nine thousand, one hundred twenty-one".