649383941 has 2 divisors, whose sum is σ = 649383942. Its totient is φ = 649383940.

The previous prime is 649383859. The next prime is 649383967. The reversal of 649383941 is 149383946.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393863716 + 255520225 = 19846^2 + 15985^2 .

It is a cyclic number.

It is not a de Polignac number, because 649383941 - 2¹⁰ = 649382917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649373941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324691970 + 324691971.

It is an arithmetic number, because the mean of its divisors is an integer number (324691971).

Almost surely, 2^649383941 is an apocalyptic number.

It is an amenable number.

649383941 is a deficient number, since it is larger than the sum of its proper divisors (1).

649383941 is an equidigital number, since it uses as much as digits as its factorization.

649383941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 47.

The square root of 649383941 is about 25483.0127928391. The cubic root of 649383941 is about 865.9653499142.

The spelling of 649383941 in words is "six hundred forty-nine million, three hundred eighty-three thousand, nine hundred forty-one".