23499745 has 4 divisors (see below), whose sum is σ = 28199700. Its totient is φ = 18799792.

The previous prime is 23499743. The next prime is 23499761. The reversal of 23499745 is 54799432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5035536 + 18464209 = 2244^2 + 4297^2 .

It is a cyclic number.

It is not a de Polignac number, because 23499745 - 2¹ = 23499743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23499743) 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, 2349970 + ... + 2349979.

It is an arithmetic number, because the mean of its divisors is an integer number (7049925).

Almost surely, 2^23499745 is an apocalyptic number.

It is an amenable number.

23499745 is a deficient number, since it is larger than the sum of its proper divisors (4699955).

23499745 is an equidigital number, since it uses as much as digits as its factorization.

23499745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699954.

The product of its digits is 272160, while the sum is 43.

The square root of 23499745 is about 4847.6535561032. The cubic root of 23499745 is about 286.4316797621.

The spelling of 23499745 in words is "twenty-three million, four hundred ninety-nine thousand, seven hundred forty-five".