23471989 has 2 divisors, whose sum is σ = 23471990. Its totient is φ = 23471988.

The previous prime is 23471969. The next prime is 23471993. The reversal of 23471989 is 98917432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14668900 + 8803089 = 3830^2 + 2967^2 .

It is a cyclic number.

It is not a de Polignac number, because 23471989 - 2¹⁷ = 23340917 is a prime.

It is a super-2 number, since 2×23471989² = 1101868535232242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23471969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11735994 + 11735995.

It is an arithmetic number, because the mean of its divisors is an integer number (11735995).

Almost surely, 2^23471989 is an apocalyptic number.

It is an amenable number.

23471989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23471989 is an equidigital number, since it uses as much as digits as its factorization.

23471989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 23471989 is about 4844.7898819247. The cubic root of 23471989 is about 286.3188653493.

The spelling of 23471989 in words is "twenty-three million, four hundred seventy-one thousand, nine hundred eighty-nine".