13641989 has 2 divisors, whose sum is σ = 13641990. Its totient is φ = 13641988.

The previous prime is 13641961. The next prime is 13642001. The reversal of 13641989 is 98914631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13432225 + 209764 = 3665^2 + 458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13641989 is a prime.

It is a super-2 number, since 2×13641989² = 372207727752242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13641949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6820994 + 6820995.

It is an arithmetic number, because the mean of its divisors is an integer number (6820995).

Almost surely, 2^13641989 is an apocalyptic number.

It is an amenable number.

13641989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13641989 is an equidigital number, since it uses as much as digits as its factorization.

13641989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 13641989 is about 3693.5063286801. The cubic root of 13641989 is about 238.9420387798.

The spelling of 13641989 in words is "thirteen million, six hundred forty-one thousand, nine hundred eighty-nine".