25946989 has 8 divisors (see below), whose sum is σ = 27530240. Its totient is φ = 24385536.

The previous prime is 25946959. The next prime is 25947011. The reversal of 25946989 is 98964952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25946989 - 2⁷ = 25946861 is a prime.

It is a super-2 number, since 2×25946989² = 1346492476332242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25946939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2964 + ... + 7789.

It is an arithmetic number, because the mean of its divisors is an integer number (3441280).

Almost surely, 2^25946989 is an apocalyptic number.

It is an amenable number.

25946989 is a deficient number, since it is larger than the sum of its proper divisors (1583251).

25946989 is a wasteful number, since it uses less digits than its factorization.

25946989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10899.

The product of its digits is 1399680, while the sum is 52.

The square root of 25946989 is about 5093.8187050581. The cubic root of 25946989 is about 296.0481302609.

The spelling of 25946989 in words is "twenty-five million, nine hundred forty-six thousand, nine hundred eighty-nine".