649831934 has 16 divisors (see below), whose sum is σ = 982167120. Its totient is φ = 322450560.

The previous prime is 649831933. The next prime is 649831961. The reversal of 649831934 is 439138946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649831933) 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, 210764 + ... + 213824.

It is an arithmetic number, because the mean of its divisors is an integer number (61385445).

Almost surely, 2^649831934 is an apocalyptic number.

649831934 is a deficient number, since it is larger than the sum of its proper divisors (332335186).

649831934 is a wasteful number, since it uses less digits than its factorization.

649831934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835.

The product of its digits is 559872, while the sum is 47.

The square root of 649831934 is about 25491.8013094406. The cubic root of 649831934 is about 866.1644397558.

The spelling of 649831934 in words is "six hundred forty-nine million, eight hundred thirty-one thousand, nine hundred thirty-four".