23009999 has 2 divisors, whose sum is σ = 23010000. Its totient is φ = 23009998.

The previous prime is 23009983. The next prime is 23010017. The reversal of 23009999 is 99990032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23009999 - 2⁴ = 23009983 is a prime.

It is a Chen prime.

23009999 is a modest number, since divided by 9999 gives 2300 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23009299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11504999 + 11505000.

It is an arithmetic number, because the mean of its divisors is an integer number (11505000).

Almost surely, 2^23009999 is an apocalyptic number.

23009999 is a deficient number, since it is larger than the sum of its proper divisors (1).

23009999 is an equidigital number, since it uses as much as digits as its factorization.

23009999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 23009999 is about 4796.8738778500. The cubic root of 23009999 is about 284.4279033565.

The spelling of 23009999 in words is "twenty-three million, nine thousand, nine hundred ninety-nine".