24997961 has 2 divisors, whose sum is σ = 24997962. Its totient is φ = 24997960.

The previous prime is 24997949. The next prime is 24997993. The reversal of 24997961 is 16979942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 6031936 = 4355^2 + 2456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24997961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (24994961) 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, 12498980 + 12498981.

It is an arithmetic number, because the mean of its divisors is an integer number (12498981).

Almost surely, 2^24997961 is an apocalyptic number.

It is an amenable number.

24997961 is a deficient number, since it is larger than the sum of its proper divisors (1).

24997961 is an equidigital number, since it uses as much as digits as its factorization.

24997961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 24997961 is about 4999.7960958423. The cubic root of 24997961 is about 292.3938241756.

The spelling of 24997961 in words is "twenty-four million, nine hundred ninety-seven thousand, nine hundred sixty-one".