652685993 has 2 divisors, whose sum is σ = 652685994. Its totient is φ = 652685992.

The previous prime is 652685951. The next prime is 652686077. The reversal of 652685993 is 399586256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 598634089 + 54051904 = 24467^2 + 7352^2 .

It is a cyclic number.

It is not a de Polignac number, because 652685993 - 2¹⁰ = 652684969 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (652675993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326342996 + 326342997.

It is an arithmetic number, because the mean of its divisors is an integer number (326342997).

Almost surely, 2^652685993 is an apocalyptic number.

It is an amenable number.

652685993 is a deficient number, since it is larger than the sum of its proper divisors (1).

652685993 is an equidigital number, since it uses as much as digits as its factorization.

652685993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 53.

The square root of 652685993 is about 25547.7199178322. The cubic root of 652685993 is about 867.4306513009.

The spelling of 652685993 in words is "six hundred fifty-two million, six hundred eighty-five thousand, nine hundred ninety-three".