23728949 has 2 divisors, whose sum is σ = 23728950. Its totient is φ = 23728948.

The previous prime is 23728927. The next prime is 23728987. The reversal of 23728949 is 94982732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16056049 + 7672900 = 4007^2 + 2770^2 .

It is a cyclic number.

It is not a de Polignac number, because 23728949 - 2⁸ = 23728693 is a prime.

It is a Sophie Germain 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 (23728909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11864474 + 11864475.

It is an arithmetic number, because the mean of its divisors is an integer number (11864475).

Almost surely, 2^23728949 is an apocalyptic number.

It is an amenable number.

23728949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23728949 is an equidigital number, since it uses as much as digits as its factorization.

23728949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 23728949 is about 4871.2369065772. The cubic root of 23728949 is about 287.3599025046.

The spelling of 23728949 in words is "twenty-three million, seven hundred twenty-eight thousand, nine hundred forty-nine".