23172723 has 56 divisors (see below), whose sum is σ = 41971200. Its totient is φ = 12492144.

The previous prime is 23172719. The next prime is 23172727. The reversal of 23172723 is 32727132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23172719) and next prime (23172727).

It is not a de Polignac number, because 23172723 - 2² = 23172719 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23172727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 96838 + ... + 97076.

Almost surely, 2^23172723 is an apocalyptic number.

23172723 is a deficient number, since it is larger than the sum of its proper divisors (18798477).

23172723 is an equidigital number, since it uses as much as digits as its factorization.

23172723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 268 counting only the distinct ones).

The product of its digits is 3528, while the sum is 27.

The square root of 23172723 is about 4813.8054593014. The cubic root of 23172723 is about 285.0968092172.

Adding to 23172723 its reverse (32727132), we get a palindrome (55899855).

The spelling of 23172723 in words is "twenty-three million, one hundred seventy-two thousand, seven hundred twenty-three".