649741823 has 2 divisors, whose sum is σ = 649741824. Its totient is φ = 649741822.

The previous prime is 649741783. The next prime is 649741843. The reversal of 649741823 is 328147946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649741823 - 2¹² = 649737727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649741843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324870911 + 324870912.

It is an arithmetic number, because the mean of its divisors is an integer number (324870912).

Almost surely, 2^649741823 is an apocalyptic number.

649741823 is a deficient number, since it is larger than the sum of its proper divisors (1).

649741823 is an equidigital number, since it uses as much as digits as its factorization.

649741823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 649741823 is about 25490.0337975453. The cubic root of 649741823 is about 866.1244014281.

The spelling of 649741823 in words is "six hundred forty-nine million, seven hundred forty-one thousand, eight hundred twenty-three".