16898987 has 8 divisors (see below), whose sum is σ = 19347936. Its totient is φ = 14458752.

The previous prime is 16898983. The next prime is 16899023. The reversal of 16898987 is 78989861.

It is a happy number.

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

It is not a de Polignac number, because 16898987 - 2² = 16898983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16898983) 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, 2723 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (2418492).

Almost surely, 2^16898987 is an apocalyptic number.

16898987 is a deficient number, since it is larger than the sum of its proper divisors (2448949).

16898987 is an equidigital number, since it uses as much as digits as its factorization.

16898987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357.

The product of its digits is 1741824, while the sum is 56.

The square root of 16898987 is about 4110.8377491699. The cubic root of 16898987 is about 256.6178668866.

The spelling of 16898987 in words is "sixteen million, eight hundred ninety-eight thousand, nine hundred eighty-seven".