649731053 has 2 divisors, whose sum is σ = 649731054. Its totient is φ = 649731052.

The previous prime is 649731037. The next prime is 649731073. The reversal of 649731053 is 350137946.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408767524 + 240963529 = 20218^2 + 15523^2 .

It is a cyclic number.

It is not a de Polignac number, because 649731053 - 2⁴ = 649731037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 649730998 and 649731016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649731013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324865526 + 324865527.

It is an arithmetic number, because the mean of its divisors is an integer number (324865527).

Almost surely, 2^649731053 is an apocalyptic number.

It is an amenable number.

649731053 is a deficient number, since it is larger than the sum of its proper divisors (1).

649731053 is an equidigital number, since it uses as much as digits as its factorization.

649731053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 649731053 is about 25489.8225376325. The cubic root of 649731053 is about 866.1196158291.

Adding to 649731053 its reverse (350137946), we get a palindrome (999868999).

The spelling of 649731053 in words is "six hundred forty-nine million, seven hundred thirty-one thousand, fifty-three".