25873961 has 2 divisors, whose sum is σ = 25873962. Its totient is φ = 25873960.

The previous prime is 25873937. The next prime is 25873963. The reversal of 25873961 is 16937852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25755625 + 118336 = 5075^2 + 344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25873961 is a prime.

Together with 25873963, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25873963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12936980 + 12936981.

It is an arithmetic number, because the mean of its divisors is an integer number (12936981).

Almost surely, 2^25873961 is an apocalyptic number.

It is an amenable number.

25873961 is a deficient number, since it is larger than the sum of its proper divisors (1).

25873961 is an equidigital number, since it uses as much as digits as its factorization.

25873961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 25873961 is about 5086.6453581904. The cubic root of 25873961 is about 295.7701260364.

The spelling of 25873961 in words is "twenty-five million, eight hundred seventy-three thousand, nine hundred sixty-one".