23691493 has 16 divisors (see below), whose sum is σ = 27876096. Its totient is φ = 19716480.

The previous prime is 23691491. The next prime is 23691529. The reversal of 23691493 is 39419632.

It is not a de Polignac number, because 23691493 - 2¹ = 23691491 is a prime.

It is a super-2 number, since 2×23691493² = 1122573681138098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23691491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35955 + ... + 36607.

It is an arithmetic number, because the mean of its divisors is an integer number (1742256).

Almost surely, 2^23691493 is an apocalyptic number.

It is an amenable number.

23691493 is a deficient number, since it is larger than the sum of its proper divisors (4184603).

23691493 is an equidigital number, since it uses as much as digits as its factorization.

23691493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its digits is 34992, while the sum is 37.

The square root of 23691493 is about 4867.3907794629. The cubic root of 23691493 is about 287.2086242667.

The spelling of 23691493 in words is "twenty-three million, six hundred ninety-one thousand, four hundred ninety-three".