23829989 has 2 divisors, whose sum is σ = 23829990. Its totient is φ = 23829988.

The previous prime is 23829959. The next prime is 23829991. The reversal of 23829989 is 98992832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23136100 + 693889 = 4810^2 + 833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23829989 is a prime.

Together with 23829991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23829959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11914994 + 11914995.

It is an arithmetic number, because the mean of its divisors is an integer number (11914995).

Almost surely, 2^23829989 is an apocalyptic number.

It is an amenable number.

23829989 is a deficient number, since it is larger than the sum of its proper divisors (1).

23829989 is an equidigital number, since it uses as much as digits as its factorization.

23829989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 23829989 is about 4881.5969723032. The cubic root of 23829989 is about 287.7671930645.

The spelling of 23829989 in words is "twenty-three million, eight hundred twenty-nine thousand, nine hundred eighty-nine".