16461987 has 8 divisors (see below), whose sum is σ = 22041360. Its totient is φ = 10928640.

The previous prime is 16461979. The next prime is 16462007. The reversal of 16461987 is 78916461.

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

It is not a de Polignac number, because 16461987 - 2³ = 16461979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16461917) 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, 10662 + ... + 12107.

It is an arithmetic number, because the mean of its divisors is an integer number (2755170).

Almost surely, 2^16461987 is an apocalyptic number.

16461987 is a deficient number, since it is larger than the sum of its proper divisors (5579373).

16461987 is a wasteful number, since it uses less digits than its factorization.

16461987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23013.

The product of its digits is 72576, while the sum is 42.

The square root of 16461987 is about 4057.3374274270. The cubic root of 16461987 is about 254.3865144794.

It can be divided in two parts, 1646198 and 7, that added together give a triangular number (1646205 = T₁₈₁₄).

The spelling of 16461987 in words is "sixteen million, four hundred sixty-one thousand, nine hundred eighty-seven".