653050721 has 2 divisors, whose sum is σ = 653050722. Its totient is φ = 653050720.

The previous prime is 653050679. The next prime is 653050757. The reversal of 653050721 is 127050356.

653050721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 634032400 + 19018321 = 25180^2 + 4361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-653050721 is a prime.

It is not a weakly prime, because it can be changed into another prime (653050771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326525360 + 326525361.

It is an arithmetic number, because the mean of its divisors is an integer number (326525361).

Almost surely, 2^653050721 is an apocalyptic number.

It is an amenable number.

653050721 is a deficient number, since it is larger than the sum of its proper divisors (1).

653050721 is an equidigital number, since it uses as much as digits as its factorization.

653050721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 653050721 is about 25554.8570921459. The cubic root of 653050721 is about 867.5921977601.

The spelling of 653050721 in words is "six hundred fifty-three million, fifty thousand, seven hundred twenty-one".