649487307 has 40 divisors (see below), whose sum is σ = 1037983376. Its totient is φ = 360956736.

The previous prime is 649487303. The next prime is 649487327. The reversal of 649487307 is 703784946.

It is a happy number.

It is not a de Polignac number, because 649487307 - 2² = 649487303 is a prime.

It is a super-2 number, since 2×649487307² = 843667523908224498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649487303) 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 39 ways as a sum of consecutive naturals, for example, 265293 + ... + 267729.

Almost surely, 2^649487307 is an apocalyptic number.

649487307 is a deficient number, since it is larger than the sum of its proper divisors (388496069).

649487307 is an equidigital number, since it uses as much as digits as its factorization.

649487307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505 (or 2484 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 649487307 is about 25485.0408475247. The cubic root of 649487307 is about 866.0112942931.

The spelling of 649487307 in words is "six hundred forty-nine million, four hundred eighty-seven thousand, three hundred seven".