24769981 has 2 divisors, whose sum is σ = 24769982. Its totient is φ = 24769980.

The previous prime is 24769951. The next prime is 24769993. The reversal of 24769981 is 18996742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23677956 + 1092025 = 4866^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 24769981 - 2⁵ = 24769949 is a prime.

It is a super-2 number, since 2×24769981² = 1227103917480722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24769951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12384990 + 12384991.

It is an arithmetic number, because the mean of its divisors is an integer number (12384991).

Almost surely, 2^24769981 is an apocalyptic number.

It is an amenable number.

24769981 is a deficient number, since it is larger than the sum of its proper divisors (1).

24769981 is an equidigital number, since it uses as much as digits as its factorization.

24769981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 46.

The square root of 24769981 is about 4976.9449464506. The cubic root of 24769981 is about 291.5022364973.

The spelling of 24769981 in words is "twenty-four million, seven hundred sixty-nine thousand, nine hundred eighty-one".