1691713 has 4 divisors (see below), whose sum is σ = 1719508. Its totient is φ = 1663920.

The previous prime is 1691693. The next prime is 1691737. The reversal of 1691713 is 3171961.

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 173889 + 1517824 = 417^2 + 1232^2 .

It is a cyclic number.

It is not a de Polignac number, because 1691713 - 2⁵ = 1691681 is a prime.

It is a Duffinian number.

1691713 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1691113) 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, 13806 + ... + 13927.

It is an arithmetic number, because the mean of its divisors is an integer number (429877).

2^1691713 is an apocalyptic number.

It is an amenable number.

1691713 is a deficient number, since it is larger than the sum of its proper divisors (27795).

1691713 is an equidigital number, since it uses as much as digits as its factorization.

1691713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27794.

The product of its digits is 1134, while the sum is 28.

The square root of 1691713 is about 1300.6586792852. The cubic root of 1691713 is about 119.1540739026.

The spelling of 1691713 in words is "one million, six hundred ninety-one thousand, seven hundred thirteen".