23191723 has 12 divisors (see below), whose sum is σ = 25923240. Its totient is φ = 20673216.

The previous prime is 23191717. The next prime is 23191739. The reversal of 23191723 is 32719132.

It is a de Polignac number, because none of the positive numbers 2^k-23191723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23191691 and 23191700.

It is not an unprimeable number, because it can be changed into a prime (23191703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4248 + ... + 8026.

It is an arithmetic number, because the mean of its divisors is an integer number (2160270).

Almost surely, 2^23191723 is an apocalyptic number.

23191723 is a deficient number, since it is larger than the sum of its proper divisors (2731517).

23191723 is a wasteful number, since it uses less digits than its factorization.

23191723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834 (or 3815 counting only the distinct ones).

The product of its digits is 2268, while the sum is 28.

The square root of 23191723 is about 4815.7785455729. The cubic root of 23191723 is about 285.1747076955.

The spelling of 23191723 in words is "twenty-three million, one hundred ninety-one thousand, seven hundred twenty-three".