13630889 has 4 divisors (see below), whose sum is σ = 14432724. Its totient is φ = 12829056.

The previous prime is 13630873. The next prime is 13630891. The reversal of 13630889 is 98803631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98803631 = 2857 ⋅34583.

It can be written as a sum of positive squares in 2 ways, for example, as 10627600 + 3003289 = 3260^2 + 1733^2 .

It is a cyclic number.

It is not a de Polignac number, because 13630889 - 2⁴ = 13630873 is a prime.

It is a super-2 number, since 2×13630889² = 371602269860642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13630189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400892 + ... + 400925.

It is an arithmetic number, because the mean of its divisors is an integer number (3608181).

Almost surely, 2^13630889 is an apocalyptic number.

It is an amenable number.

13630889 is a deficient number, since it is larger than the sum of its proper divisors (801835).

13630889 is an equidigital number, since it uses as much as digits as its factorization.

13630889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801834.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 13630889 is about 3692.0033856973. The cubic root of 13630889 is about 238.8772149895.

The spelling of 13630889 in words is "thirteen million, six hundred thirty thousand, eight hundred eighty-nine".