23989547 has 2 divisors, whose sum is σ = 23989548. Its totient is φ = 23989546.

The previous prime is 23989541. The next prime is 23989591. The reversal of 23989547 is 74598932.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23989547 - 2⁸ = 23989291 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23989541) 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, 11994773 + 11994774.

It is an arithmetic number, because the mean of its divisors is an integer number (11994774).

Almost surely, 2^23989547 is an apocalyptic number.

23989547 is a deficient number, since it is larger than the sum of its proper divisors (1).

23989547 is an equidigital number, since it uses as much as digits as its factorization.

23989547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 23989547 is about 4897.9125145311. The cubic root of 23989547 is about 288.4080306615.

The spelling of 23989547 in words is "twenty-three million, nine hundred eighty-nine thousand, five hundred forty-seven".