17139893 has 4 divisors (see below), whose sum is σ = 18148140. Its totient is φ = 16131648.

The previous prime is 17139851. The next prime is 17139901. The reversal of 17139893 is 39893171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39893171 = 4933 ⋅8087.

It can be written as a sum of positive squares in 2 ways, for example, as 15547249 + 1592644 = 3943^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 17139893 - 2⁸ = 17139637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 17139893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17139293) 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, 504098 + ... + 504131.

It is an arithmetic number, because the mean of its divisors is an integer number (4537035).

Almost surely, 2^17139893 is an apocalyptic number.

It is an amenable number.

17139893 is a deficient number, since it is larger than the sum of its proper divisors (1008247).

17139893 is a wasteful number, since it uses less digits than its factorization.

17139893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008246.

The product of its digits is 40824, while the sum is 41.

The square root of 17139893 is about 4140.0353863222. The cubic root of 17139893 is about 257.8315357576.

The spelling of 17139893 in words is "seventeen million, one hundred thirty-nine thousand, eight hundred ninety-three".