16389513 has 32 divisors (see below), whose sum is σ = 29387520. Its totient is φ = 8812800.

The previous prime is 16389497. The next prime is 16389539. The reversal of 16389513 is 31598361.

It is a happy number.

16389513 is a `hidden beast` number, since 1 + 63 + 89 + 513 = 666.

16389513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16389513 - 2⁴ = 16389497 is a prime.

It is a super-2 number, since 2×16389513² = 537232272754338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16389563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 663 + ... + 5763.

It is an arithmetic number, because the mean of its divisors is an integer number (918360).

Almost surely, 2^16389513 is an apocalyptic number.

It is an amenable number.

16389513 is a deficient number, since it is larger than the sum of its proper divisors (12998007).

16389513 is a wasteful number, since it uses less digits than its factorization.

16389513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5134 (or 5128 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 16389513 is about 4048.3963491733. The cubic root of 16389513 is about 254.0126525617.

It can be divided in two parts, 163 and 89513, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 16389513 in words is "sixteen million, three hundred eighty-nine thousand, five hundred thirteen".