649686946 has 8 divisors (see below), whose sum is σ = 983154924. Its totient is φ = 321968640.

The previous prime is 649686941. The next prime is 649686949.

649686946 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 603242721 + 46444225 = 24561^2 + 6815^2 .

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

It is not an unprimeable number, because it can be changed into a prime (649686941) 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 3 ways as a sum of consecutive naturals, for example, 1437135 + ... + 1437586.

Almost surely, 2^649686946 is an apocalyptic number.

649686946 is a deficient number, since it is larger than the sum of its proper divisors (333467978).

649686946 is a wasteful number, since it uses less digits than its factorization.

649686946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874836.

The product of its digits is 13436928, while the sum is 58.

The square root of 649686946 is about 25488.9573345008. The cubic root of 649686946 is about 866.1000165389.

The spelling of 649686946 in words is "six hundred forty-nine million, six hundred eighty-six thousand, nine hundred forty-six".