613706 has 4 divisors (see below), whose sum is σ = 920562. Its totient is φ = 306852.

The previous prime is 613699. The next prime is 613733. The reversal of 613706 is 607316.

613706 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.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 43681 = 755^2 + 209^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153425 + ... + 153428.

2⁶¹³⁷⁰⁶ is an apocalyptic number.

613706 is a deficient number, since it is larger than the sum of its proper divisors (306856).

613706 is a wasteful number, since it uses less digits than its factorization.

613706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306855.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 613706 is about 783.3938983679. The cubic root of 613706 is about 84.9806645755.

The spelling of 613706 in words is "six hundred thirteen thousand, seven hundred six".