649738811 has 2 divisors, whose sum is σ = 649738812. Its totient is φ = 649738810.

The previous prime is 649738783. The next prime is 649738847. The reversal of 649738811 is 118837946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 649738811 - 2¹⁴ = 649722427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (649738871) 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, 324869405 + 324869406.

It is an arithmetic number, because the mean of its divisors is an integer number (324869406).

Almost surely, 2^649738811 is an apocalyptic number.

649738811 is a deficient number, since it is larger than the sum of its proper divisors (1).

649738811 is an equidigital number, since it uses as much as digits as its factorization.

649738811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 649738811 is about 25489.9747155622. The cubic root of 649738811 is about 866.1230630653.

The spelling of 649738811 in words is "six hundred forty-nine million, seven hundred thirty-eight thousand, eight hundred eleven".