16387861 has 8 divisors (see below), whose sum is σ = 19714880. Its totient is φ = 13307328.

The previous prime is 16387853. The next prime is 16387867. The reversal of 16387861 is 16878361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16387861 - 2³ = 16387853 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 (16387867) 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 in 7 ways as a sum of consecutive naturals, for example, 61476 + ... + 61741.

It is an arithmetic number, because the mean of its divisors is an integer number (2464360).

Almost surely, 2^16387861 is an apocalyptic number.

It is an amenable number.

16387861 is a deficient number, since it is larger than the sum of its proper divisors (3327019).

16387861 is a wasteful number, since it uses less digits than its factorization.

16387861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123243.

The product of its digits is 48384, while the sum is 40.

The square root of 16387861 is about 4048.1923126255. The cubic root of 16387861 is about 254.0041177748.

The spelling of 16387861 in words is "sixteen million, three hundred eighty-seven thousand, eight hundred sixty-one".