23239897 has 4 divisors (see below), whose sum is σ = 23250996. Its totient is φ = 23228800.

The previous prime is 23239891. The next prime is 23239921. The reversal of 23239897 is 79893232.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19175641 + 4064256 = 4379^2 + 2016^2 .

It is a cyclic number.

It is not a de Polignac number, because 23239897 - 2³ = 23239889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23239891) 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, 1348 + ... + 6949.

It is an arithmetic number, because the mean of its divisors is an integer number (5812749).

Almost surely, 2^23239897 is an apocalyptic number.

It is an amenable number.

23239897 is a deficient number, since it is larger than the sum of its proper divisors (11099).

23239897 is an equidigital number, since it uses as much as digits as its factorization.

23239897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11098.

The product of its digits is 163296, while the sum is 43.

The square root of 23239897 is about 4820.7776343656. Note that the first 3 decimals coincide. The cubic root of 23239897 is about 285.3720267290.

The spelling of 23239897 in words is "twenty-three million, two hundred thirty-nine thousand, eight hundred ninety-seven".