24013981 has 2 divisors, whose sum is σ = 24013982. Its totient is φ = 24013980.

The previous prime is 24013949. The next prime is 24013991. The reversal of 24013981 is 18931042.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15405625 + 8608356 = 3925^2 + 2934^2 .

It is a cyclic number.

It is not a de Polignac number, because 24013981 - 2⁵ = 24013949 is a prime.

It is a super-3 number, since 3×24013981³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24013921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12006990 + 12006991.

It is an arithmetic number, because the mean of its divisors is an integer number (12006991).

Almost surely, 2^24013981 is an apocalyptic number.

It is an amenable number.

24013981 is a deficient number, since it is larger than the sum of its proper divisors (1).

24013981 is an equidigital number, since it uses as much as digits as its factorization.

24013981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 24013981 is about 4900.4062076526. The cubic root of 24013981 is about 288.5059145532.

The spelling of 24013981 in words is "twenty-four million, thirteen thousand, nine hundred eighty-one".