25066989 has 10 divisors (see below), whose sum is σ = 37445870. Its totient is φ = 16711272.

The previous prime is 25066969. The next prime is 25066999. The reversal of 25066989 is 98966052.

25066989 is a `hidden beast` number, since 2 + 506 + 69 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24950025 + 116964 = 4995^2 + 342^2 .

It is not a de Polignac number, because 25066989 - 2⁸ = 25066733 is a prime.

It is a super-2 number, since 2×25066989² = 1256707875052242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25066919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 154654 + ... + 154815.

It is an arithmetic number, because the mean of its divisors is an integer number (3744587).

Almost surely, 2^25066989 is an apocalyptic number.

It is an amenable number.

25066989 is a deficient number, since it is larger than the sum of its proper divisors (12378881).

25066989 is an equidigital number, since it uses as much as digits as its factorization.

25066989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309481 (or 309472 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 25066989 is about 5006.6944184761. The cubic root of 25066989 is about 292.6627102606.

The spelling of 25066989 in words is "twenty-five million, sixty-six thousand, nine hundred eighty-nine".