16839891 has 6 divisors (see below), whose sum is σ = 24324300. Its totient is φ = 11226588.

The previous prime is 16839883. The next prime is 16839899. The reversal of 16839891 is 19893861.

It is an interprime number because it is at equal distance from previous prime (16839883) and next prime (16839899).

It is not a de Polignac number, because 16839891 - 2³ = 16839883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16839899) 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 5 ways as a sum of consecutive naturals, for example, 935541 + ... + 935558.

It is an arithmetic number, because the mean of its divisors is an integer number (4054050).

Almost surely, 2^16839891 is an apocalyptic number.

16839891 is a deficient number, since it is larger than the sum of its proper divisors (7484409).

16839891 is a wasteful number, since it uses less digits than its factorization.

16839891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871105 (or 1871102 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 16839891 is about 4103.6436248778. The cubic root of 16839891 is about 256.3183853970.

The spelling of 16839891 in words is "sixteen million, eight hundred thirty-nine thousand, eight hundred ninety-one".