649455073 has 2 divisors, whose sum is σ = 649455074. Its totient is φ = 649455072.

The previous prime is 649455049. The next prime is 649455089. The reversal of 649455073 is 370554946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638219169 + 11235904 = 25263^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 649455073 - 2⁵ = 649455041 is a prime.

It is not a weakly prime, because it can be changed into another prime (649455173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324727536 + 324727537.

It is an arithmetic number, because the mean of its divisors is an integer number (324727537).

Almost surely, 2^649455073 is an apocalyptic number.

It is an amenable number.

649455073 is a deficient number, since it is larger than the sum of its proper divisors (1).

649455073 is an equidigital number, since it uses as much as digits as its factorization.

649455073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 43.

The square root of 649455073 is about 25484.4084294692. The cubic root of 649455073 is about 865.9969673670.

The spelling of 649455073 in words is "six hundred forty-nine million, four hundred fifty-five thousand, seventy-three".