25010989 has 2 divisors, whose sum is σ = 25010990. Its totient is φ = 25010988.

The previous prime is 25010987. The next prime is 25011023. The reversal of 25010989 is 98901052.

It is an a-pointer prime, because the next prime (25011023) can be obtained adding 25010989 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24900100 + 110889 = 4990^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 25010989 - 2¹ = 25010987 is a prime.

Together with 25010987, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

25010989 is a modest number, since divided by 10989 gives 25 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25010987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12505494 + 12505495.

It is an arithmetic number, because the mean of its divisors is an integer number (12505495).

Almost surely, 2^25010989 is an apocalyptic number.

It is an amenable number.

25010989 is a deficient number, since it is larger than the sum of its proper divisors (1).

25010989 is an equidigital number, since it uses as much as digits as its factorization.

25010989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 25010989 is about 5001.0987792684. The cubic root of 25010989 is about 292.4446102534. Note that the first 3 decimals are identical.

The spelling of 25010989 in words is "twenty-five million, ten thousand, nine hundred eighty-nine".