16990571 has 8 divisors (see below), whose sum is σ = 18476640. Its totient is φ = 15530112.

The previous prime is 16990559. The next prime is 16990577. The reversal of 16990571 is 17509961.

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

It is not a de Polignac number, because 16990571 - 2⁶ = 16990507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16990577) 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, 5006 + ... + 7683.

It is an arithmetic number, because the mean of its divisors is an integer number (2309580).

Almost surely, 2^16990571 is an apocalyptic number.

16990571 is a deficient number, since it is larger than the sum of its proper divisors (1486069).

16990571 is a wasteful number, since it uses less digits than its factorization.

16990571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 16990571 is about 4121.9620328188. The cubic root of 16990571 is about 257.0806118150.

The spelling of 16990571 in words is "sixteen million, nine hundred ninety thousand, five hundred seventy-one".