17316691391 has 4 divisors (see below), whose sum is σ = 17317070232. Its totient is φ = 17316312552.

The previous prime is 17316691373. The next prime is 17316691393. The reversal of 17316691391 is 19319661371.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17316691391 is a prime.

It is a super-2 number, since 2×17316691391² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17316691393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109661 + ... + 216006.

It is an arithmetic number, because the mean of its divisors is an integer number (4329267558).

Almost surely, 2^17316691391 is an apocalyptic number.

17316691391 is a deficient number, since it is larger than the sum of its proper divisors (378841).

17316691391 is an equidigital number, since it uses as much as digits as its factorization.

17316691391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378840.

The product of its digits is 183708, while the sum is 47.

The spelling of 17316691391 in words is "seventeen billion, three hundred sixteen million, six hundred ninety-one thousand, three hundred ninety-one".