23538689 has 2 divisors, whose sum is σ = 23538690. Its totient is φ = 23538688.

The previous prime is 23538653. The next prime is 23538709. The reversal of 23538689 is 98683532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23280625 + 258064 = 4825^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 23538689 - 2⁸ = 23538433 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1479995 and since 23538689 and 1479995 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (23538089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11769344 + 11769345.

It is an arithmetic number, because the mean of its divisors is an integer number (11769345).

Almost surely, 2^23538689 is an apocalyptic number.

It is an amenable number.

23538689 is a deficient number, since it is larger than the sum of its proper divisors (1).

23538689 is an equidigital number, since it uses as much as digits as its factorization.

23538689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 23538689 is about 4851.6686820103. The cubic root of 23538689 is about 286.5898182024.

Adding to 23538689 its reverse (98683532), we get a palindrome (122222221).

The spelling of 23538689 in words is "twenty-three million, five hundred thirty-eight thousand, six hundred eighty-nine".