23909947 has 2 divisors, whose sum is σ = 23909948. Its totient is φ = 23909946.

The previous prime is 23909911. The next prime is 23909957. The reversal of 23909947 is 74990932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23909947 - 2²³ = 15521339 is a prime.

It is not a weakly prime, because it can be changed into another prime (23909957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11954973 + 11954974.

It is an arithmetic number, because the mean of its divisors is an integer number (11954974).

Almost surely, 2^23909947 is an apocalyptic number.

23909947 is a deficient number, since it is larger than the sum of its proper divisors (1).

23909947 is an equidigital number, since it uses as much as digits as its factorization.

23909947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 23909947 is about 4889.7798518952. The cubic root of 23909947 is about 288.0886871608.

The spelling of 23909947 in words is "twenty-three million, nine hundred nine thousand, nine hundred forty-seven".