647369 has 4 divisors (see below), whose sum is σ = 650496. Its totient is φ = 644244.

The previous prime is 647363. The next prime is 647371. The reversal of 647369 is 963746.

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 647369 - 2⁸ = 647113 is a prime.

It is a super-2 number, since 2×647369² = 838173244322, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 647369.

It is not an unprimeable number, because it can be changed into a prime (647363) 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, 1229 + ... + 1674.

It is an arithmetic number, because the mean of its divisors is an integer number (162624).

2⁶⁴⁷³⁶⁹ is an apocalyptic number.

It is an amenable number.

647369 is a deficient number, since it is larger than the sum of its proper divisors (3127).

647369 is a wasteful number, since it uses less digits than its factorization.

647369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126.

The product of its digits is 27216, while the sum is 35.

The square root of 647369 is about 804.5924434147. The cubic root of 647369 is about 86.5068768409.

The spelling of 647369 in words is "six hundred forty-seven thousand, three hundred sixty-nine".