23513493 has 4 divisors (see below), whose sum is σ = 31351328. Its totient is φ = 15675660.

The previous prime is 23513473. The next prime is 23513513. The reversal of 23513493 is 39431532.

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 an interprime number because it is at equal distance from previous prime (23513473) and next prime (23513513).

It is not a de Polignac number, because 23513493 - 2⁹ = 23512981 is a prime.

It is a super-2 number, since 2×23513493² = 1105768706122098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23513493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23513443) 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 3 ways as a sum of consecutive naturals, for example, 3918913 + ... + 3918918.

It is an arithmetic number, because the mean of its divisors is an integer number (7837832).

Almost surely, 2^23513493 is an apocalyptic number.

It is an amenable number.

23513493 is a deficient number, since it is larger than the sum of its proper divisors (7837835).

23513493 is an equidigital number, since it uses as much as digits as its factorization.

23513493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7837834.

The product of its digits is 9720, while the sum is 30.

The square root of 23513493 is about 4849.0713543935. The cubic root of 23513493 is about 286.4875256882.

The spelling of 23513493 in words is "twenty-three million, five hundred thirteen thousand, four hundred ninety-three".