647343349 has 8 divisors (see below), whose sum is σ = 675792000. Its totient is φ = 618920016.

The previous prime is 647343343. The next prime is 647343373. The reversal of 647343349 is 943343746.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647343349 is a prime.

It is a super-2 number, since 2×647343349² = 838106822989071602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647343343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61527 + ... + 71275.

It is an arithmetic number, because the mean of its divisors is an integer number (84474000).

Almost surely, 2^647343349 is an apocalyptic number.

It is an amenable number.

647343349 is a deficient number, since it is larger than the sum of its proper divisors (28448651).

647343349 is a wasteful number, since it uses less digits than its factorization.

647343349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12659.

The product of its digits is 653184, while the sum is 43.

The square root of 647343349 is about 25442.9430098014. The cubic root of 647343349 is about 865.0573425850.

The spelling of 647343349 in words is "six hundred forty-seven million, three hundred forty-three thousand, three hundred forty-nine".