649000635 has 16 divisors (see below), whose sum is σ = 1057994784. Its totient is φ = 339602432.

The previous prime is 649000633. The next prime is 649000661. The reversal of 649000635 is 536000946.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 649000635 - 2¹ = 649000633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649000596 and 649000605.

It is not an unprimeable number, because it can be changed into a prime (649000633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407382 + ... + 408971.

It is an arithmetic number, because the mean of its divisors is an integer number (66124674).

Almost surely, 2^649000635 is an apocalyptic number.

649000635 is a deficient number, since it is larger than the sum of its proper divisors (408994149).

649000635 is a wasteful number, since it uses less digits than its factorization.

649000635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816414.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 649000635 is about 25475.4908686761. The cubic root of 649000635 is about 865.7949345286.

The spelling of 649000635 in words is "six hundred forty-nine million, six hundred thirty-five", and thus it is an aban number.