16293987 has 16 divisors (see below), whose sum is σ = 24448000. Its totient is φ = 10723752.

The previous prime is 16293961. The next prime is 16293989. The reversal of 16293987 is 78939261.

It is not a de Polignac number, because 16293987 - 2²³ = 7905379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16293989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1687 + ... + 5952.

It is an arithmetic number, because the mean of its divisors is an integer number (1528000).

Almost surely, 2^16293987 is an apocalyptic number.

16293987 is a deficient number, since it is larger than the sum of its proper divisors (8154013).

16293987 is an equidigital number, since it uses as much as digits as its factorization.

16293987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727 (or 7721 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 16293987 is about 4036.5811028642. The cubic root of 16293987 is about 253.5181878341.

It can be divided in two parts, 162 and 93987, that added together give a palindrome (94149).

The spelling of 16293987 in words is "sixteen million, two hundred ninety-three thousand, nine hundred eighty-seven".