23905949 has 2 divisors, whose sum is σ = 23905950. Its totient is φ = 23905948.

The previous prime is 23905897. The next prime is 23905951. The reversal of 23905949 is 94950932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22629049 + 1276900 = 4757^2 + 1130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23905949 is a prime.

It is a Sophie Germain prime.

Together with 23905951, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23905969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11952974 + 11952975.

It is an arithmetic number, because the mean of its divisors is an integer number (11952975).

Almost surely, 2^23905949 is an apocalyptic number.

It is an amenable number.

23905949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23905949 is an equidigital number, since it uses as much as digits as its factorization.

23905949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 23905949 is about 4889.3710229435. The cubic root of 23905949 is about 288.0726290912.

The spelling of 23905949 in words is "twenty-three million, nine hundred five thousand, nine hundred forty-nine".