16987477 has 8 divisors (see below), whose sum is σ = 18789176. Its totient is φ = 15256512.

The previous prime is 16987469. The next prime is 16987483. The reversal of 16987477 is 77478961.

It can be written as a sum of positive squares in 4 ways, for example, as 2954961 + 14032516 = 1719^2 + 3746^2 .

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 16987477 - 2³ = 16987469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16987477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16987447) 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 7 ways as a sum of consecutive naturals, for example, 17178 + ... + 18139.

It is an arithmetic number, because the mean of its divisors is an integer number (2348647).

Almost surely, 2^16987477 is an apocalyptic number.

It is an amenable number.

16987477 is a deficient number, since it is larger than the sum of its proper divisors (1801699).

16987477 is a wasteful number, since it uses less digits than its factorization.

16987477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35367.

The product of its digits is 592704, while the sum is 49.

The square root of 16987477 is about 4121.5867090236. The cubic root of 16987477 is about 257.0650059887.

The spelling of 16987477 in words is "sixteen million, nine hundred eighty-seven thousand, four hundred seventy-seven".