649135273 has 2 divisors, whose sum is σ = 649135274. Its totient is φ = 649135272.

The previous prime is 649135237. The next prime is 649135301. The reversal of 649135273 is 372531946.

It is a happy number.

Together with previous prime (649135237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 637663504 + 11471769 = 25252^2 + 3387^2 .

It is a cyclic number.

It is not a de Polignac number, because 649135273 - 2¹⁷ = 649004201 is a prime.

It is not a weakly prime, because it can be changed into another prime (649135073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324567636 + 324567637.

It is an arithmetic number, because the mean of its divisors is an integer number (324567637).

Almost surely, 2^649135273 is an apocalyptic number.

It is an amenable number.

649135273 is a deficient number, since it is larger than the sum of its proper divisors (1).

649135273 is an equidigital number, since it uses as much as digits as its factorization.

649135273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 40.

The square root of 649135273 is about 25478.1332322445. The cubic root of 649135273 is about 865.8548013618.

The spelling of 649135273 in words is "six hundred forty-nine million, one hundred thirty-five thousand, two hundred seventy-three".