647000617 has 4 divisors (see below), whose sum is σ = 648162756. Its totient is φ = 645838480.

The previous prime is 647000591. The next prime is 647000633. The reversal of 647000617 is 716000746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 716000746 = 2 ⋅358000373.

It can be written as a sum of positive squares in 2 ways, for example, as 119333776 + 527666841 = 10924^2 + 22971^2 .

It is a cyclic number.

It is not a de Polignac number, because 647000617 - 2¹⁹ = 646476329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647000017) 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, 580234 + ... + 581347.

It is an arithmetic number, because the mean of its divisors is an integer number (162040689).

Almost surely, 2^647000617 is an apocalyptic number.

It is an amenable number.

647000617 is a deficient number, since it is larger than the sum of its proper divisors (1162139).

647000617 is a wasteful number, since it uses less digits than its factorization.

647000617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162138.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 647000617 is about 25436.2068123374. The cubic root of 647000617 is about 864.9046491843.

The spelling of 647000617 in words is "six hundred forty-seven million, six hundred seventeen", and thus it is an aban number.