713665 has 4 divisors (see below), whose sum is σ = 856404. Its totient is φ = 570928.

The previous prime is 713663. The next prime is 713681. The reversal of 713665 is 566317.

713665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566317 = 229 ⋅2473.

It can be written as a sum of positive squares in 2 ways, for example, as 142129 + 571536 = 377^2 + 756^2 .

It is a cyclic number.

It is not a de Polignac number, because 713665 - 2¹ = 713663 is a prime.

It is a Duffinian number.

713665 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (713663) 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, 71362 + ... + 71371.

It is an arithmetic number, because the mean of its divisors is an integer number (214101).

2⁷¹³⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

713665 is a deficient number, since it is larger than the sum of its proper divisors (142739).

713665 is a wasteful number, since it uses less digits than its factorization.

713665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142738.

The product of its digits is 3780, while the sum is 28.

The square root of 713665 is about 844.7869553917. The cubic root of 713665 is about 89.3644525998.

It can be divided in two parts, 713 and 665, that added together give a triangular number (1378 = T₅₂).

The spelling of 713665 in words is "seven hundred thirteen thousand, six hundred sixty-five".