16113987 has 6 divisors (see below), whose sum is σ = 23275772. Its totient is φ = 10742652.

The previous prime is 16113971. The next prime is 16113989. The reversal of 16113987 is 78931161.

16113987 is a `hidden beast` number, since 1 + 611 + 39 + 8 + 7 = 666.

It is not a de Polignac number, because 16113987 - 2⁴ = 16113971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16113989) 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 5 ways as a sum of consecutive naturals, for example, 895213 + ... + 895230.

Almost surely, 2^16113987 is an apocalyptic number.

16113987 is a deficient number, since it is larger than the sum of its proper divisors (7161785).

16113987 is a wasteful number, since it uses less digits than its factorization.

16113987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790449 (or 1790446 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 16113987 is about 4014.2230879711. The cubic root of 16113987 is about 252.5811888053.

It can be divided in two parts, 16 and 113987, that added together give a triangular number (114003 = T₄₇₇).

The spelling of 16113987 in words is "sixteen million, one hundred thirteen thousand, nine hundred eighty-seven".