649598293 has 2 divisors, whose sum is σ = 649598294. Its totient is φ = 649598292.

The previous prime is 649598251. The next prime is 649598303. The reversal of 649598293 is 392895946.

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., 637158564 + 12439729 = 25242^2 + 3527^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-649598293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649598093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324799146 + 324799147.

It is an arithmetic number, because the mean of its divisors is an integer number (324799147).

Almost surely, 2^649598293 is an apocalyptic number.

It is an amenable number.

649598293 is a deficient number, since it is larger than the sum of its proper divisors (1).

649598293 is an equidigital number, since it uses as much as digits as its factorization.

649598293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 55.

The square root of 649598293 is about 25487.2182279667. The cubic root of 649598293 is about 866.0606202020.

The spelling of 649598293 in words is "six hundred forty-nine million, five hundred ninety-eight thousand, two hundred ninety-three".