16989017 has 4 divisors (see below), whose sum is σ = 17008656. Its totient is φ = 16969380.

The previous prime is 16989013. The next prime is 16989079. The reversal of 16989017 is 71098961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71098961 = 41 ⋅1734121.

It is a cyclic number.

It is not a de Polignac number, because 16989017 - 2² = 16989013 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (16989013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8459 + ... + 10272.

It is an arithmetic number, because the mean of its divisors is an integer number (4252164).

Almost surely, 2^16989017 is an apocalyptic number.

It is an amenable number.

16989017 is a deficient number, since it is larger than the sum of its proper divisors (19639).

16989017 is an equidigital number, since it uses as much as digits as its factorization.

16989017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19638.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 16989017 is about 4121.7735260443. The cubic root of 16989017 is about 257.0727738314.

The spelling of 16989017 in words is "sixteen million, nine hundred eighty-nine thousand, seventeen".