23891493 has 16 divisors (see below), whose sum is σ = 33656000. Its totient is φ = 15033600.

The previous prime is 23891489. The next prime is 23891501. The reversal of 23891493 is 39419832.

It is not a de Polignac number, because 23891493 - 2² = 23891489 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 (23891423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19293 + ... + 20493.

It is an arithmetic number, because the mean of its divisors is an integer number (2103500).

Almost surely, 2^23891493 is an apocalyptic number.

It is an amenable number.

23891493 is a deficient number, since it is larger than the sum of its proper divisors (9764507).

23891493 is a wasteful number, since it uses less digits than its factorization.

23891493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572.

The product of its digits is 46656, while the sum is 39.

The square root of 23891493 is about 4887.8924906344. The cubic root of 23891493 is about 288.0145512517.

The spelling of 23891493 in words is "twenty-three million, eight hundred ninety-one thousand, four hundred ninety-three".