13587989 has 2 divisors, whose sum is σ = 13587990. Its totient is φ = 13587988.

The previous prime is 13587971. The next prime is 13588007. The reversal of 13587989 is 98978531.

It is a balanced prime because it is at equal distance from previous prime (13587971) and next prime (13588007).

It can be written as a sum of positive squares in only one way, i.e., 13380964 + 207025 = 3658^2 + 455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13587989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13587929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6793994 + 6793995.

It is an arithmetic number, because the mean of its divisors is an integer number (6793995).

Almost surely, 2^13587989 is an apocalyptic number.

It is an amenable number.

13587989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13587989 is an equidigital number, since it uses as much as digits as its factorization.

13587989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The square root of 13587989 is about 3686.1889533772. The cubic root of 13587989 is about 238.6263484408.

The spelling of 13587989 in words is "thirteen million, five hundred eighty-seven thousand, nine hundred eighty-nine".