23853997 has 4 divisors (see below), whose sum is σ = 23866780. Its totient is φ = 23841216.

The previous prime is 23853959. The next prime is 23854027. The reversal of 23853997 is 79935832.

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 292681 + 23561316 = 541^2 + 4854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23853997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23853917) 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, 2988 + ... + 7525.

It is an arithmetic number, because the mean of its divisors is an integer number (5966695).

Almost surely, 2^23853997 is an apocalyptic number.

It is an amenable number.

23853997 is a deficient number, since it is larger than the sum of its proper divisors (12783).

23853997 is a wasteful number, since it uses less digits than its factorization.

23853997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12782.

The product of its digits is 408240, while the sum is 46.

The square root of 23853997 is about 4884.0553846164. The cubic root of 23853997 is about 287.8637995710.

The spelling of 23853997 in words is "twenty-three million, eight hundred fifty-three thousand, nine hundred ninety-seven".