23689321 has 2 divisors, whose sum is σ = 23689322. Its totient is φ = 23689320.

The previous prime is 23689291. The next prime is 23689327. The reversal of 23689321 is 12398632.

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., 23474025 + 215296 = 4845^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 23689321 - 2⁹ = 23688809 is a prime.

It is a super-2 number, since 2×23689321² = 1122367858882082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23689327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11844660 + 11844661.

It is an arithmetic number, because the mean of its divisors is an integer number (11844661).

Almost surely, 2^23689321 is an apocalyptic number.

It is an amenable number.

23689321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23689321 is an equidigital number, since it uses as much as digits as its factorization.

23689321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 23689321 is about 4867.1676568616. The cubic root of 23689321 is about 287.1998470487.

The spelling of 23689321 in words is "twenty-three million, six hundred eighty-nine thousand, three hundred twenty-one".