13056989 has 18 divisors (see below), whose sum is σ = 15094170. Its totient is φ = 11272800.

The previous prime is 13056973. The next prime is 13057007. The reversal of 13056989 is 98965031.

13056989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 511225 + 12545764 = 715^2 + 3542^2 .

It is not a de Polignac number, because 13056989 - 2⁴ = 13056973 is a prime.

It is a super-2 number, since 2×13056989² = 340969923492242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13056919) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 214019 + ... + 214079.

It is an arithmetic number, because the mean of its divisors is an integer number (838565).

Almost surely, 2^13056989 is an apocalyptic number.

It is an amenable number.

13056989 is a deficient number, since it is larger than the sum of its proper divisors (2037181).

13056989 is an equidigital number, since it uses as much as digits as its factorization.

13056989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 13056989 is about 3613.4455855873. The cubic root of 13056989 is about 235.4765582063.

The spelling of 13056989 in words is "thirteen million, fifty-six thousand, nine hundred eighty-nine".