23940281 has 2 divisors, whose sum is σ = 23940282. Its totient is φ = 23940280.

The previous prime is 23940251. The next prime is 23940331. The reversal of 23940281 is 18204932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16128256 + 7812025 = 4016^2 + 2795^2 .

It is a cyclic number.

It is not a de Polignac number, because 23940281 - 2¹⁴ = 23923897 is a prime.

It is a super-2 number, since 2×23940281² = 1146274108717922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23940251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11970140 + 11970141.

It is an arithmetic number, because the mean of its divisors is an integer number (11970141).

Almost surely, 2^23940281 is an apocalyptic number.

It is an amenable number.

23940281 is a deficient number, since it is larger than the sum of its proper divisors (1).

23940281 is an equidigital number, since it uses as much as digits as its factorization.

23940281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 23940281 is about 4892.8806443648. The cubic root of 23940281 is about 288.2104661737.

The spelling of 23940281 in words is "twenty-three million, nine hundred forty thousand, two hundred eighty-one".