23916649 has 4 divisors (see below), whose sum is σ = 25175440. Its totient is φ = 22657860.

The previous prime is 23916647. The next prime is 23916661. The reversal of 23916649 is 94661932.

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 23916649 - 2¹ = 23916647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23916647) 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, 629367 + ... + 629404.

It is an arithmetic number, because the mean of its divisors is an integer number (6293860).

Almost surely, 2^23916649 is an apocalyptic number.

It is an amenable number.

23916649 is a deficient number, since it is larger than the sum of its proper divisors (1258791).

23916649 is a wasteful number, since it uses less digits than its factorization.

23916649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258790.

The product of its digits is 69984, while the sum is 40.

The square root of 23916649 is about 4890.4651108049. The cubic root of 23916649 is about 288.1156019006.

The spelling of 23916649 in words is "twenty-three million, nine hundred sixteen thousand, six hundred forty-nine".