716647 has 4 divisors (see below), whose sum is σ = 722016. Its totient is φ = 711280.

The previous prime is 716633. The next prime is 716659. The reversal of 716647 is 746617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746617 = 281 ⋅2657.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-716647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716687) 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, 2479 + ... + 2752.

It is an arithmetic number, because the mean of its divisors is an integer number (180504).

2⁷¹⁶⁶⁴⁷ is an apocalyptic number.

716647 is the 453-rd centered heptagonal number.

716647 is a deficient number, since it is larger than the sum of its proper divisors (5369).

716647 is a wasteful number, since it uses less digits than its factorization.

716647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368.

The product of its digits is 7056, while the sum is 31.

The square root of 716647 is about 846.5500575867. The cubic root of 716647 is about 89.4887473759.

The spelling of 716647 in words is "seven hundred sixteen thousand, six hundred forty-seven".