23172447 has 8 divisors (see below), whose sum is σ = 30919680. Its totient is φ = 15436760.

The previous prime is 23172437. The next prime is 23172449. The reversal of 23172447 is 74427132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23172447 - 2⁷ = 23172319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23172449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4504 + ... + 8162.

It is an arithmetic number, because the mean of its divisors is an integer number (3864960).

Almost surely, 2^23172447 is an apocalyptic number.

23172447 is a deficient number, since it is larger than the sum of its proper divisors (7747233).

23172447 is a wasteful number, since it uses less digits than its factorization.

23172447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5773.

The product of its digits is 9408, while the sum is 30.

The square root of 23172447 is about 4813.7767916678. The cubic root of 23172447 is about 285.0956773256.

Adding to 23172447 its reverse (74427132), we get a palindrome (97599579).

The spelling of 23172447 in words is "twenty-three million, one hundred seventy-two thousand, four hundred forty-seven".