23905147 has 4 divisors (see below), whose sum is σ = 27320176. Its totient is φ = 20490120.

The previous prime is 23905139. The next prime is 23905157. The reversal of 23905147 is 74150932.

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

It is not a de Polignac number, because 23905147 - 2³ = 23905139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23905157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1707504 + ... + 1707517.

It is an arithmetic number, because the mean of its divisors is an integer number (6830044).

Almost surely, 2^23905147 is an apocalyptic number.

23905147 is a deficient number, since it is larger than the sum of its proper divisors (3415029).

23905147 is an equidigital number, since it uses as much as digits as its factorization.

23905147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415028.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 23905147 is about 4889.2890076165. The cubic root of 23905147 is about 288.0694076221.

The spelling of 23905147 in words is "twenty-three million, nine hundred five thousand, one hundred forty-seven".