16912513 has 4 divisors (see below), whose sum is σ = 17036100. Its totient is φ = 16788928.

The previous prime is 16912507. The next prime is 16912517. The reversal of 16912513 is 31521961.

16912513 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31521961 = 17 ⋅1854233.

It can be written as a sum of positive squares in 2 ways, for example, as 10188864 + 6723649 = 3192^2 + 2593^2 .

It is a cyclic number.

It is not a de Polignac number, because 16912513 - 2¹⁷ = 16781441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16912517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61588 + ... + 61861.

It is an arithmetic number, because the mean of its divisors is an integer number (4259025).

Almost surely, 2^16912513 is an apocalyptic number.

It is an amenable number.

16912513 is a deficient number, since it is larger than the sum of its proper divisors (123587).

16912513 is a wasteful number, since it uses less digits than its factorization.

16912513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123586.

The product of its digits is 1620, while the sum is 28.

The square root of 16912513 is about 4112.4825835497. The cubic root of 16912513 is about 256.6863145320.

The spelling of 16912513 in words is "sixteen million, nine hundred twelve thousand, five hundred thirteen".