23599949 has 2 divisors, whose sum is σ = 23599950. Its totient is φ = 23599948.

The previous prime is 23599943. The next prime is 23599981. The reversal of 23599949 is 94999532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16933225 + 6666724 = 4115^2 + 2582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23599949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23599897 and 23599906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23599943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11799974 + 11799975.

It is an arithmetic number, because the mean of its divisors is an integer number (11799975).

Almost surely, 2^23599949 is an apocalyptic number.

It is an amenable number.

23599949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23599949 is an equidigital number, since it uses as much as digits as its factorization.

23599949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 50.

The square root of 23599949 is about 4857.9778715017. The cubic root of 23599949 is about 286.8382217824.

The spelling of 23599949 in words is "twenty-three million, five hundred ninety-nine thousand, nine hundred forty-nine".