647311 has 16 divisors (see below), whose sum is σ = 808960. Its totient is φ = 505440.

The previous prime is 647303. The next prime is 647321. The reversal of 647311 is 113746.

647311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 647311 - 2³ = 647303 is a prime.

It is an Ulam number.

It is a Duffinian number.

647311 is an undulating number in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4045 + ... + 4201.

It is an arithmetic number, because the mean of its divisors is an integer number (50560).

2⁶⁴⁷³¹¹ is an apocalyptic number.

647311 is a deficient number, since it is larger than the sum of its proper divisors (161649).

647311 is a wasteful number, since it uses less digits than its factorization.

647311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214.

The product of its digits is 504, while the sum is 22.

The square root of 647311 is about 804.5563995147. The cubic root of 647311 is about 86.5042932815.

The spelling of 647311 in words is "six hundred forty-seven thousand, three hundred eleven".