16990043 has 8 divisors (see below), whose sum is σ = 19454688. Its totient is φ = 14534784.

The previous prime is 16990037. The next prime is 16990081. The reversal of 16990043 is 34009961.

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 16990043 - 2²⁴ = 212827 is a prime.

It is a super-2 number, since 2×16990043² = 577323122283698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16989991 and 16990009.

It is not an unprimeable number, because it can be changed into a prime (16990003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2105 + ... + 6197.

It is an arithmetic number, because the mean of its divisors is an integer number (2431836).

Almost surely, 2^16990043 is an apocalyptic number.

16990043 is a deficient number, since it is larger than the sum of its proper divisors (2464645).

16990043 is an equidigital number, since it uses as much as digits as its factorization.

16990043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16990043 is about 4121.8979851520. The cubic root of 16990043 is about 257.0779487700.

The spelling of 16990043 in words is "sixteen million, nine hundred ninety thousand, forty-three".