649367739 has 32 divisors (see below), whose sum is σ = 998184000. Its totient is φ = 416731392.

The previous prime is 649367729. The next prime is 649367767. The reversal of 649367739 is 937763946.

649367739 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 649367739 - 2⁷ = 649367611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649367729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309807 + ... + 311895.

It is an arithmetic number, because the mean of its divisors is an integer number (31193250).

Almost surely, 2^649367739 is an apocalyptic number.

649367739 is a deficient number, since it is larger than the sum of its proper divisors (348816261).

649367739 is a wasteful number, since it uses less digits than its factorization.

649367739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524 (or 2518 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 54.

The square root of 649367739 is about 25482.6948928091. The cubic root of 649367739 is about 865.9581479667.

The spelling of 649367739 in words is "six hundred forty-nine million, three hundred sixty-seven thousand, seven hundred thirty-nine".