23281949 has 2 divisors, whose sum is σ = 23281950. Its totient is φ = 23281948.

The previous prime is 23281943. The next prime is 23281969. The reversal of 23281949 is 94918232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15856324 + 7425625 = 3982^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 23281949 - 2⁴ = 23281933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1464878 and since 23281949 and 1464878 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23281943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11640974 + 11640975.

It is an arithmetic number, because the mean of its divisors is an integer number (11640975).

Almost surely, 2^23281949 is an apocalyptic number.

It is an amenable number.

23281949 is a deficient number, since it is larger than the sum of its proper divisors (1).

23281949 is an equidigital number, since it uses as much as digits as its factorization.

23281949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 23281949 is about 4825.1372001219. The cubic root of 23281949 is about 285.5440474793.

The spelling of 23281949 in words is "twenty-three million, two hundred eighty-one thousand, nine hundred forty-nine".