23538649 has 4 divisors (see below), whose sum is σ = 23662080. Its totient is φ = 23415220.

The previous prime is 23538643. The next prime is 23538653. The reversal of 23538649 is 94683532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23538649 - 2⁵ = 23538617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23538643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61429 + ... + 61810.

It is an arithmetic number, because the mean of its divisors is an integer number (5915520).

Almost surely, 2^23538649 is an apocalyptic number.

It is an amenable number.

23538649 is a deficient number, since it is larger than the sum of its proper divisors (123431).

23538649 is a wasteful number, since it uses less digits than its factorization.

23538649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123430.

The product of its digits is 155520, while the sum is 40.

The square root of 23538649 is about 4851.6645597156. The cubic root of 23538649 is about 286.5896558654.

The spelling of 23538649 in words is "twenty-three million, five hundred thirty-eight thousand, six hundred forty-nine".