649694307 has 16 divisors (see below), whose sum is σ = 872516480. Its totient is φ = 430012800.

The previous prime is 649694293. The next prime is 649694351. The reversal of 649694307 is 703496946.

649694307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 649694307 - 2⁸ = 649694051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649694387) 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, 272832 + ... + 275202.

It is an arithmetic number, because the mean of its divisors is an integer number (54532280).

Almost surely, 2^649694307 is an apocalyptic number.

649694307 is a deficient number, since it is larger than the sum of its proper divisors (222822173).

649694307 is a wasteful number, since it uses less digits than its factorization.

649694307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994.

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 649694307 is about 25489.1017299551. The cubic root of 649694307 is about 866.1032875185.

The spelling of 649694307 in words is "six hundred forty-nine million, six hundred ninety-four thousand, three hundred seven".