16984405 has 8 divisors (see below), whose sum is σ = 20428632. Its totient is φ = 13555968.

The previous prime is 16984381. The next prime is 16984427. The reversal of 16984405 is 50448961.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1096209 + 15888196 = 1047^2 + 3986^2 .

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 16984405 - 2⁹ = 16983893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1432 + ... + 6001.

It is an arithmetic number, because the mean of its divisors is an integer number (2553579).

Almost surely, 2^16984405 is an apocalyptic number.

It is an amenable number.

16984405 is a deficient number, since it is larger than the sum of its proper divisors (3444227).

16984405 is an equidigital number, since it uses as much as digits as its factorization.

16984405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 16984405 is about 4121.2140201644. The cubic root of 16984405 is about 257.0495092534.

The spelling of 16984405 in words is "sixteen million, nine hundred eighty-four thousand, four hundred five".