23039999 has 4 divisors (see below), whose sum is σ = 23049600. Its totient is φ = 23030400.

The previous prime is 23039993. The next prime is 23040023. The reversal of 23039999 is 99993032.

It is a Cunningham number, because it is equal to 4800²-1.

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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23039999 is a prime.

It is a Duffinian number.

23039999 is a modest number, since divided by 9999 gives 2303 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23039993) 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, 2399 + ... + 7199.

It is an arithmetic number, because the mean of its divisors is an integer number (5762400).

Almost surely, 2^23039999 is an apocalyptic number.

23039999 is a deficient number, since it is larger than the sum of its proper divisors (9601).

23039999 is an equidigital number, since it uses as much as digits as its factorization.

23039999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9600.

The product of its (nonzero) digits is 118098, while the sum is 44.

The square root of 23039999 is about 4799.9998958333. Note that the first 3 decimals coincide. The cubic root of 23039999 is about 284.5514602424.

The spelling of 23039999 in words is "twenty-three million, thirty-nine thousand, nine hundred ninety-nine".