13389487 has 4 divisors (see below), whose sum is σ = 13417920. Its totient is φ = 13361056.

The previous prime is 13389463. The next prime is 13389491. The reversal of 13389487 is 78498331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13389487 - 2¹⁵ = 13356719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13389437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13498 + ... + 14455.

It is an arithmetic number, because the mean of its divisors is an integer number (3354480).

Almost surely, 2^13389487 is an apocalyptic number.

13389487 is a deficient number, since it is larger than the sum of its proper divisors (28433).

13389487 is an equidigital number, since it uses as much as digits as its factorization.

13389487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28432.

The product of its digits is 145152, while the sum is 43.

The square root of 13389487 is about 3659.1647954144. The cubic root of 13389487 is about 237.4586417364.

The spelling of 13389487 in words is "thirteen million, three hundred eighty-nine thousand, four hundred eighty-seven".