23917493 has 4 divisors (see below), whose sum is σ = 24957408. Its totient is φ = 22877580.

The previous prime is 23917457. The next prime is 23917513. The reversal of 23917493 is 39471932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23917493 - 2¹² = 23913397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23917403) 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, 519923 + ... + 519968.

It is an arithmetic number, because the mean of its divisors is an integer number (6239352).

Almost surely, 2^23917493 is an apocalyptic number.

23917493 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23917493 is a deficient number, since it is larger than the sum of its proper divisors (1039915).

23917493 is a wasteful number, since it uses less digits than its factorization.

23917493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039914.

The product of its digits is 40824, while the sum is 38.

The square root of 23917493 is about 4890.5514004047. The cubic root of 23917493 is about 288.1189909861.

The spelling of 23917493 in words is "twenty-three million, nine hundred seventeen thousand, four hundred ninety-three".