25954987 has 2 divisors, whose sum is σ = 25954988. Its totient is φ = 25954986.

The previous prime is 25954963. The next prime is 25954991. The reversal of 25954987 is 78945952.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25954987 is a prime.

It is a super-2 number, since 2×25954987² = 1347322700340338, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25954987.

It is not a weakly prime, because it can be changed into another prime (25951987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12977493 + 12977494.

It is an arithmetic number, because the mean of its divisors is an integer number (12977494).

Almost surely, 2^25954987 is an apocalyptic number.

25954987 is a deficient number, since it is larger than the sum of its proper divisors (1).

25954987 is an equidigital number, since it uses as much as digits as its factorization.

25954987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The square root of 25954987 is about 5094.6037137348. The cubic root of 25954987 is about 296.0785454753.

The spelling of 25954987 in words is "twenty-five million, nine hundred fifty-four thousand, nine hundred eighty-seven".