23960991 has 4 divisors (see below), whose sum is σ = 31947992. Its totient is φ = 15973992.

The previous prime is 23960971. The next prime is 23960999. The reversal of 23960991 is 19906932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23960991 - 2⁶ = 23960927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23960999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3993496 + ... + 3993501.

It is an arithmetic number, because the mean of its divisors is an integer number (7986998).

Almost surely, 2^23960991 is an apocalyptic number.

23960991 is a deficient number, since it is larger than the sum of its proper divisors (7987001).

23960991 is an equidigital number, since it uses as much as digits as its factorization.

23960991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7987000.

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 23960991 is about 4894.9965270672. The cubic root of 23960991 is about 288.2935495542.

The spelling of 23960991 in words is "twenty-three million, nine hundred sixty thousand, nine hundred ninety-one".