23040649 has 4 divisors (see below), whose sum is σ = 23083780. Its totient is φ = 22997520.

The previous prime is 23040643. The next prime is 23040653. The reversal of 23040649 is 94604032.

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 5760000 + 17280649 = 2400^2 + 4157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23040649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23040643) 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, 20754 + ... + 21835.

It is an arithmetic number, because the mean of its divisors is an integer number (5770945).

Almost surely, 2^23040649 is an apocalyptic number.

It is an amenable number.

23040649 is a deficient number, since it is larger than the sum of its proper divisors (43131).

23040649 is an equidigital number, since it uses as much as digits as its factorization.

23040649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43130.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 23040649 is about 4800.0676036906. The cubic root of 23040649 is about 284.5541361209.

The spelling of 23040649 in words is "twenty-three million, forty thousand, six hundred forty-nine".