649073671 has 2 divisors, whose sum is σ = 649073672. Its totient is φ = 649073670.

The previous prime is 649073627. The next prime is 649073729. The reversal of 649073671 is 176370946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649073671 - 2⁷ = 649073543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649073171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324536835 + 324536836.

It is an arithmetic number, because the mean of its divisors is an integer number (324536836).

Almost surely, 2^649073671 is an apocalyptic number.

649073671 is a deficient number, since it is larger than the sum of its proper divisors (1).

649073671 is an equidigital number, since it uses as much as digits as its factorization.

649073671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 649073671 is about 25476.9242845364. The cubic root of 649073671 is about 865.8274110386.

The spelling of 649073671 in words is "six hundred forty-nine million, seventy-three thousand, six hundred seventy-one".