24780961 has 2 divisors, whose sum is σ = 24780962. Its totient is φ = 24780960.

The previous prime is 24780949. The next prime is 24780983. The reversal of 24780961 is 16908742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24690961 + 90000 = 4969^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 24780961 - 2⁵ = 24780929 is a prime.

It is a super-2 number, since 2×24780961² = 1228192056167042, 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 24780961.

It is not a weakly prime, because it can be changed into another prime (24780911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12390480 + 12390481.

It is an arithmetic number, because the mean of its divisors is an integer number (12390481).

Almost surely, 2^24780961 is an apocalyptic number.

It is an amenable number.

24780961 is a deficient number, since it is larger than the sum of its proper divisors (1).

24780961 is an equidigital number, since it uses as much as digits as its factorization.

24780961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 24780961 is about 4978.0479105770. The cubic root of 24780961 is about 291.5453023592.

The spelling of 24780961 in words is "twenty-four million, seven hundred eighty thousand, nine hundred sixty-one".