23947291 has 2 divisors, whose sum is σ = 23947292. Its totient is φ = 23947290.

The previous prime is 23947289. The next prime is 23947303. The reversal of 23947291 is 19274932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23947291 - 2¹ = 23947289 is a prime.

Together with 23947289, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23947291.

It is not a weakly prime, because it can be changed into another prime (23947211) 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, 11973645 + 11973646.

It is an arithmetic number, because the mean of its divisors is an integer number (11973646).

Almost surely, 2^23947291 is an apocalyptic number.

23947291 is a deficient number, since it is larger than the sum of its proper divisors (1).

23947291 is an equidigital number, since it uses as much as digits as its factorization.

23947291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 37.

The square root of 23947291 is about 4893.5969388580. The cubic root of 23947291 is about 288.2385939165.

The spelling of 23947291 in words is "twenty-three million, nine hundred forty-seven thousand, two hundred ninety-one".