16825913 has 4 divisors (see below), whose sum is σ = 18120228. Its totient is φ = 15531600.

The previous prime is 16825889. The next prime is 16825927. The reversal of 16825913 is 31952861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8369449 + 8456464 = 2893^2 + 2908^2 .

It is a cyclic number.

It is not a de Polignac number, because 16825913 - 2²² = 12631609 is a prime.

It is a super-2 number, since 2×16825913² = 566222696567138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16825993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647138 + ... + 647163.

It is an arithmetic number, because the mean of its divisors is an integer number (4530057).

Almost surely, 2^16825913 is an apocalyptic number.

16825913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16825913 is a deficient number, since it is larger than the sum of its proper divisors (1294315).

16825913 is a wasteful number, since it uses less digits than its factorization.

16825913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294314.

The product of its digits is 12960, while the sum is 35.

The square root of 16825913 is about 4101.9401507092. The cubic root of 16825913 is about 256.2474464945.

The spelling of 16825913 in words is "sixteen million, eight hundred twenty-five thousand, nine hundred thirteen".