23909147 has 4 divisors (see below), whose sum is σ = 24097536. Its totient is φ = 23720760.

The previous prime is 23909129. The next prime is 23909173. The reversal of 23909147 is 74190932.

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

It is a cyclic number.

It is not a de Polignac number, because 23909147 - 2¹² = 23905051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23909177) 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, 94004 + ... + 94257.

It is an arithmetic number, because the mean of its divisors is an integer number (6024384).

Almost surely, 2^23909147 is an apocalyptic number.

23909147 is a deficient number, since it is larger than the sum of its proper divisors (188389).

23909147 is a wasteful number, since it uses less digits than its factorization.

23909147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188388.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 23909147 is about 4889.6980479371. The cubic root of 23909147 is about 288.0854740835.

The spelling of 23909147 in words is "twenty-three million, nine hundred nine thousand, one hundred forty-seven".