649122737 has 8 divisors (see below), whose sum is σ = 655429320. Its totient is φ = 642826240.

The previous prime is 649122731. The next prime is 649122743. The reversal of 649122737 is 737221946.

649122737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (649122731) and next prime (649122743).

It can be written as a sum of positive squares in 4 ways, for example, as 88190881 + 560931856 = 9391^2 + 23684^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649122737 - 2¹⁸ = 648860593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649122694 and 649122703.

It is not an unprimeable number, because it can be changed into a prime (649122731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211937 + ... + 214977.

It is an arithmetic number, because the mean of its divisors is an integer number (81928665).

Almost surely, 2^649122737 is an apocalyptic number.

It is an amenable number.

649122737 is a deficient number, since it is larger than the sum of its proper divisors (6306583).

649122737 is a wasteful number, since it uses less digits than its factorization.

649122737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043.

The product of its digits is 127008, while the sum is 41.

The square root of 649122737 is about 25477.8872161724. The cubic root of 649122737 is about 865.8492275746.

The spelling of 649122737 in words is "six hundred forty-nine million, one hundred twenty-two thousand, seven hundred thirty-seven".