649567834 has 4 divisors (see below), whose sum is σ = 974351754. Its totient is φ = 324783916.

The previous prime is 649567813. The next prime is 649567843. The reversal of 649567834 is 438765946.

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., 597655809 + 51912025 = 24447^2 + 7205^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162391957 + ... + 162391960.

Almost surely, 2^649567834 is an apocalyptic number.

649567834 is a deficient number, since it is larger than the sum of its proper divisors (324783920).

649567834 is a wasteful number, since it uses less digits than its factorization.

649567834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324783919.

The product of its digits is 4354560, while the sum is 52.

The square root of 649567834 is about 25486.6206861561. The cubic root of 649567834 is about 866.0470837580.

The spelling of 649567834 in words is "six hundred forty-nine million, five hundred sixty-seven thousand, eight hundred thirty-four".