23564749 has 4 divisors (see below), whose sum is σ = 25377436. Its totient is φ = 21752064.

The previous prime is 23564741. The next prime is 23564753. The reversal of 23564749 is 94746532.

It is a happy number.

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 6812100 + 16752649 = 2610^2 + 4093^2 .

It is a cyclic number.

It is not a de Polignac number, because 23564749 - 2³ = 23564741 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23564741) 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, 906324 + ... + 906349.

It is an arithmetic number, because the mean of its divisors is an integer number (6344359).

Almost surely, 2^23564749 is an apocalyptic number.

It is an amenable number.

23564749 is a deficient number, since it is larger than the sum of its proper divisors (1812687).

23564749 is a wasteful number, since it uses less digits than its factorization.

23564749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1812686.

The product of its digits is 181440, while the sum is 40.

The square root of 23564749 is about 4854.3536129952. The cubic root of 23564749 is about 286.6955416801.

The spelling of 23564749 in words is "twenty-three million, five hundred sixty-four thousand, seven hundred forty-nine".