649321033 has 2 divisors, whose sum is σ = 649321034. Its totient is φ = 649321032.

The previous prime is 649320871. The next prime is 649321063. The reversal of 649321033 is 330123946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643789129 + 5531904 = 25373^2 + 2352^2 .

It is a cyclic number.

It is not a de Polignac number, because 649321033 - 2²⁵ = 615766601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649320986 and 649321004.

It is not a weakly prime, because it can be changed into another prime (649321063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324660516 + 324660517.

It is an arithmetic number, because the mean of its divisors is an integer number (324660517).

Almost surely, 2^649321033 is an apocalyptic number.

It is an amenable number.

649321033 is a deficient number, since it is larger than the sum of its proper divisors (1).

649321033 is an equidigital number, since it uses as much as digits as its factorization.

649321033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 649321033 is about 25481.7784504928. The cubic root of 649321033 is about 865.9373860221.

Adding to 649321033 its reverse (330123946), we get a palindrome (979444979).

The spelling of 649321033 in words is "six hundred forty-nine million, three hundred twenty-one thousand, thirty-three".