16990539 has 4 divisors (see below), whose sum is σ = 22654056. Its totient is φ = 11327024.

The previous prime is 16990517. The next prime is 16990559. The reversal of 16990539 is 93509961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93509961 = 3 ⋅31169987.

It is a cyclic number.

It is not a de Polignac number, because 16990539 - 2⁵ = 16990507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16990539.

It is not an unprimeable number, because it can be changed into a prime (16990559) 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, 2831754 + ... + 2831759.

It is an arithmetic number, because the mean of its divisors is an integer number (5663514).

Almost surely, 2^16990539 is an apocalyptic number.

16990539 is a deficient number, since it is larger than the sum of its proper divisors (5663517).

16990539 is an equidigital number, since it uses as much as digits as its factorization.

16990539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5663516.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 16990539 is about 4121.9581511704. The cubic root of 16990539 is about 257.0804504199.

The spelling of 16990539 in words is "sixteen million, nine hundred ninety thousand, five hundred thirty-nine".