23153947 has 4 divisors (see below), whose sum is σ = 23383296. Its totient is φ = 22924600.

The previous prime is 23153941. The next prime is 23153981. The reversal of 23153947 is 74935132.

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 23153947 - 2²³ = 14765339 is a prime.

It is a super-2 number, since 2×23153947² = 1072210523357618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23153941) 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, 114523 + ... + 114724.

It is an arithmetic number, because the mean of its divisors is an integer number (5845824).

Almost surely, 2^23153947 is an apocalyptic number.

23153947 is a deficient number, since it is larger than the sum of its proper divisors (229349).

23153947 is a wasteful number, since it uses less digits than its factorization.

23153947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229348.

The product of its digits is 22680, while the sum is 34.

The square root of 23153947 is about 4811.8548398720. The cubic root of 23153947 is about 285.0197872791.

The spelling of 23153947 in words is "twenty-three million, one hundred fifty-three thousand, nine hundred forty-seven".