647449369 has 8 divisors (see below), whose sum is σ = 783468288. Its totient is φ = 522312000.

The previous prime is 647449349. The next prime is 647449399. The reversal of 647449369 is 963944746.

647449369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 647449369 - 2¹⁷ = 647318297 is a prime.

It is a super-2 number, since 2×647449369² = 838381370836996322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647449349) 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, 2720257 + ... + 2720494.

It is an arithmetic number, because the mean of its divisors is an integer number (97933536).

Almost surely, 2^647449369 is an apocalyptic number.

It is an amenable number.

647449369 is a deficient number, since it is larger than the sum of its proper divisors (136018919).

647449369 is a wasteful number, since it uses less digits than its factorization.

647449369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5440775.

The product of its digits is 3919104, while the sum is 52.

The square root of 647449369 is about 25445.0264098900. The cubic root of 647449369 is about 865.1045655274.

The spelling of 647449369 in words is "six hundred forty-seven million, four hundred forty-nine thousand, three hundred sixty-nine".