647583 has 8 divisors (see below), whose sum is σ = 875568. Its totient is φ = 425664.

The previous prime is 647579. The next prime is 647587. The reversal of 647583 is 385746.

It is an interprime number because it is at equal distance from previous prime (647579) and next prime (647587).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 647583 - 2² = 647579 is a prime.

647583 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1260 + ... + 1697.

It is an arithmetic number, because the mean of its divisors is an integer number (109446).

2⁶⁴⁷⁵⁸³ is an apocalyptic number.

647583 is a deficient number, since it is larger than the sum of its proper divisors (227985).

647583 is a wasteful number, since it uses less digits than its factorization.

647583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033.

The product of its digits is 20160, while the sum is 33.

The square root of 647583 is about 804.7254190095. The cubic root of 647583 is about 86.5164079492.

The spelling of 647583 in words is "six hundred forty-seven thousand, five hundred eighty-three".