649297727 has 16 divisors (see below), whose sum is σ = 709927680. Its totient is φ = 590257152.

The previous prime is 649297717. The next prime is 649297729. The reversal of 649297727 is 727792946.

It is a cyclic number.

It is not a de Polignac number, because 649297727 - 2¹⁴ = 649281343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649297729) 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, 280049 + ... + 282357.

It is an arithmetic number, because the mean of its divisors is an integer number (44370480).

Almost surely, 2^649297727 is an apocalyptic number.

649297727 is a deficient number, since it is larger than the sum of its proper divisors (60629953).

649297727 is a wasteful number, since it uses less digits than its factorization.

649297727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642.

The product of its digits is 2667168, while the sum is 53.

The square root of 649297727 is about 25481.3211392188. The cubic root of 649297727 is about 865.9270255701.

The spelling of 649297727 in words is "six hundred forty-nine million, two hundred ninety-seven thousand, seven hundred twenty-seven".