649322169 has 8 divisors (see below), whose sum is σ = 911329440. Its totient is φ = 410098176.

The previous prime is 649322147. The next prime is 649322221. The reversal of 649322169 is 961223946.

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

It is not a de Polignac number, because 649322169 - 2⁵ = 649322137 is a prime.

It is a super-2 number, since 2×649322169² = 843238558309729122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 649322169.

It is not an unprimeable number, because it can be changed into a prime (649322119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5695752 + ... + 5695865.

It is an arithmetic number, because the mean of its divisors is an integer number (113916180).

Almost surely, 2^649322169 is an apocalyptic number.

It is an amenable number.

649322169 is a deficient number, since it is larger than the sum of its proper divisors (262007271).

649322169 is a wasteful number, since it uses less digits than its factorization.

649322169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11391639.

The product of its digits is 139968, while the sum is 42.

The square root of 649322169 is about 25481.8007409210. The cubic root of 649322169 is about 865.9378910133.

The spelling of 649322169 in words is "six hundred forty-nine million, three hundred twenty-two thousand, one hundred sixty-nine".