16406987 has 8 divisors (see below), whose sum is σ = 16753392. Its totient is φ = 16063200.

The previous prime is 16406977. The next prime is 16406993. The reversal of 16406987 is 78960461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16406987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16406917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16412 + ... + 17382.

It is an arithmetic number, because the mean of its divisors is an integer number (2094174).

Almost surely, 2^16406987 is an apocalyptic number.

16406987 is a deficient number, since it is larger than the sum of its proper divisors (346405).

16406987 is an equidigital number, since it uses as much as digits as its factorization.

16406987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 16406987 is about 4050.5539127384. The cubic root of 16406987 is about 254.1028940184.

The spelling of 16406987 in words is "sixteen million, four hundred six thousand, nine hundred eighty-seven".