647117 has 2 divisors, whose sum is σ = 647118. Its totient is φ = 647116.

The previous prime is 647113. The next prime is 647131. The reversal of 647117 is 711746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556516 + 90601 = 746^2 + 301^2 .

It is a cyclic number.

It is not a de Polignac number, because 647117 - 2² = 647113 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647117.

It is not a weakly prime, because it can be changed into another prime (647111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323558 + 323559.

It is an arithmetic number, because the mean of its divisors is an integer number (323559).

2⁶⁴⁷¹¹⁷ is an apocalyptic number.

It is an amenable number.

647117 is a deficient number, since it is larger than the sum of its proper divisors (1).

647117 is an equidigital number, since it uses as much as digits as its factorization.

647117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 26.

The square root of 647117 is about 804.4358271484. The cubic root of 647117 is about 86.4956505994.

The spelling of 647117 in words is "six hundred forty-seven thousand, one hundred seventeen".