16990895 has 4 divisors (see below), whose sum is σ = 20389080. Its totient is φ = 13592712.

The previous prime is 16990889. The next prime is 16990913. The reversal of 16990895 is 59809961.

16990895 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16990895 - 2⁸ = 16990639 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1699085 + ... + 1699094.

It is an arithmetic number, because the mean of its divisors is an integer number (5097270).

Almost surely, 2^16990895 is an apocalyptic number.

16990895 is a deficient number, since it is larger than the sum of its proper divisors (3398185).

16990895 is an equidigital number, since it uses as much as digits as its factorization.

16990895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3398184.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 16990895 is about 4122.0013343035. The cubic root of 16990895 is about 257.0822459290.

The spelling of 16990895 in words is "sixteen million, nine hundred ninety thousand, eight hundred ninety-five".