717947 has 4 divisors (see below), whose sum is σ = 719976. Its totient is φ = 715920.

The previous prime is 717923. The next prime is 717967. The reversal of 717947 is 749717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749717 = 17 ⋅44101.

It is a cyclic number.

It is not a de Polignac number, because 717947 - 2⁶ = 717883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (717917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329 + ... + 1242.

It is an arithmetic number, because the mean of its divisors is an integer number (179994).

2⁷¹⁷⁹⁴⁷ is an apocalyptic number.

717947 is a deficient number, since it is larger than the sum of its proper divisors (2029).

717947 is a wasteful number, since it uses less digits than its factorization.

717947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028.

The product of its digits is 12348, while the sum is 35.

The square root of 717947 is about 847.3175319796. The cubic root of 717947 is about 89.5428256497.

The spelling of 717947 in words is "seven hundred seventeen thousand, nine hundred forty-seven".