652720997 has 2 divisors, whose sum is σ = 652720998. Its totient is φ = 652720996.

The previous prime is 652720987. The next prime is 652721039. The reversal of 652720997 is 799027256.

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., 597753601 + 54967396 = 24449^2 + 7414^2 .

It is a cyclic number.

It is not a de Polignac number, because 652720997 - 2⁸ = 652720741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652720907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326360498 + 326360499.

It is an arithmetic number, because the mean of its divisors is an integer number (326360499).

Almost surely, 2^652720997 is an apocalyptic number.

It is an amenable number.

652720997 is a deficient number, since it is larger than the sum of its proper divisors (1).

652720997 is an equidigital number, since it uses as much as digits as its factorization.

652720997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 652720997 is about 25548.4049795677. The cubic root of 652720997 is about 867.4461579918.

The spelling of 652720997 in words is "six hundred fifty-two million, seven hundred twenty thousand, nine hundred ninety-seven".