649225773 has 24 divisors (see below), whose sum is σ = 1111434688. Its totient is φ = 370985184.

The previous prime is 649225769. The next prime is 649225781. The reversal of 649225773 is 377522946.

649225773 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 649225773 - 2² = 649225769 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649225723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189136 + ... + 192537.

Almost surely, 2^649225773 is an apocalyptic number.

649225773 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

649225773 is a deficient number, since it is larger than the sum of its proper divisors (462208915).

649225773 is an equidigital number, since it uses as much as digits as its factorization.

649225773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381695 (or 381683 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The square root of 649225773 is about 25479.9092031349. The cubic root of 649225773 is about 865.8950375661.

The spelling of 649225773 in words is "six hundred forty-nine million, two hundred twenty-five thousand, seven hundred seventy-three".