23199949 has 2 divisors, whose sum is σ = 23199950. Its totient is φ = 23199948.

The previous prime is 23199929. The next prime is 23199959. The reversal of 23199949 is 94999132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20994724 + 2205225 = 4582^2 + 1485^2 .

It is a cyclic number.

It is not a de Polignac number, because 23199949 - 2¹⁵ = 23167181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23199899 and 23199908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23199929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11599974 + 11599975.

It is an arithmetic number, because the mean of its divisors is an integer number (11599975).

Almost surely, 2^23199949 is an apocalyptic number.

It is an amenable number.

23199949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23199949 is an equidigital number, since it uses as much as digits as its factorization.

23199949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 46.

The square root of 23199949 is about 4816.6325373647. The cubic root of 23199949 is about 285.2084204392.

The spelling of 23199949 in words is "twenty-three million, one hundred ninety-nine thousand, nine hundred forty-nine".