23407749 has 12 divisors (see below), whose sum is σ = 34161036. Its totient is φ = 15443712.

The previous prime is 23407733. The next prime is 23407757. The reversal of 23407749 is 94770432.

It can be written as a sum of positive squares in 2 ways, for example, as 14062500 + 9345249 = 3750^2 + 3057^2 .

It is not a de Polignac number, because 23407749 - 2⁴ = 23407733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23407729) 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 11 ways as a sum of consecutive naturals, for example, 12534 + ... + 14279.

It is an arithmetic number, because the mean of its divisors is an integer number (2846753).

Almost surely, 2^23407749 is an apocalyptic number.

It is an amenable number.

23407749 is a deficient number, since it is larger than the sum of its proper divisors (10753287).

23407749 is a wasteful number, since it uses less digits than its factorization.

23407749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26916 (or 26913 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 23407749 is about 4838.1555369789. The cubic root of 23407749 is about 286.0574199673.

The spelling of 23407749 in words is "twenty-three million, four hundred seven thousand, seven hundred forty-nine".