647313 has 4 divisors (see below), whose sum is σ = 863088. Its totient is φ = 431540.

The previous prime is 647303. The next prime is 647321. The reversal of 647313 is 313746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 647313 - 2⁸ = 647057 is a prime.

It is an Ulam number.

It is a D-number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647313.

It is not an unprimeable number, because it can be changed into a prime (647303) 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, 107883 + ... + 107888.

It is an arithmetic number, because the mean of its divisors is an integer number (215772).

2⁶⁴⁷³¹³ is an apocalyptic number.

It is an amenable number.

647313 is a deficient number, since it is larger than the sum of its proper divisors (215775).

647313 is a wasteful number, since it uses less digits than its factorization.

647313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215774.

The product of its digits is 1512, while the sum is 24.

The square root of 647313 is about 804.5576424346. The cubic root of 647313 is about 86.5043823723.

The spelling of 647313 in words is "six hundred forty-seven thousand, three hundred thirteen".