23867281 has 2 divisors, whose sum is σ = 23867282. Its totient is φ = 23867280.

The previous prime is 23867227. The next prime is 23867299. The reversal of 23867281 is 18276832.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21242881 + 2624400 = 4609^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 23867281 - 2⁷ = 23867153 is a prime.

It is a super-2 number, since 2×23867281² = 1139294204665922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23867281.

It is not a weakly prime, because it can be changed into another prime (23867581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11933640 + 11933641.

It is an arithmetic number, because the mean of its divisors is an integer number (11933641).

Almost surely, 2^23867281 is an apocalyptic number.

It is an amenable number.

23867281 is a deficient number, since it is larger than the sum of its proper divisors (1).

23867281 is an equidigital number, since it uses as much as digits as its factorization.

23867281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 23867281 is about 4885.4151307745. The cubic root of 23867281 is about 287.9172256011.

The spelling of 23867281 in words is "twenty-three million, eight hundred sixty-seven thousand, two hundred eighty-one".