649586794 has 4 divisors (see below), whose sum is σ = 974380194. Its totient is φ = 324793396.

The previous prime is 649586761. The next prime is 649586797. The reversal of 649586794 is 497685946.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 405821025 + 243765769 = 20145^2 + 15613^2 .

It is not an unprimeable number, because it can be changed into a prime (649586797) 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 as a sum of consecutive naturals, namely, 162396697 + ... + 162396700.

Almost surely, 2^649586794 is an apocalyptic number.

649586794 is a deficient number, since it is larger than the sum of its proper divisors (324793400).

649586794 is a wasteful number, since it uses less digits than its factorization.

649586794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324793399.

The product of its digits is 13063680, while the sum is 58.

The square root of 649586794 is about 25486.9926433073. The cubic root of 649586794 is about 866.0555099208.

The spelling of 649586794 in words is "six hundred forty-nine million, five hundred eighty-six thousand, seven hundred ninety-four".