685552601 has 2 divisors, whose sum is σ = 685552602. Its totient is φ = 685552600.

The previous prime is 685552583. The next prime is 685552607. The reversal of 685552601 is 106255586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 683299600 + 2253001 = 26140^2 + 1501^2 .

It is a cyclic number.

It is not a de Polignac number, because 685552601 - 2⁶ = 685552537 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (685552607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342776300 + 342776301.

It is an arithmetic number, because the mean of its divisors is an integer number (342776301).

Almost surely, 2^685552601 is an apocalyptic number.

It is an amenable number.

685552601 is a deficient number, since it is larger than the sum of its proper divisors (1).

685552601 is an equidigital number, since it uses as much as digits as its factorization.

685552601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 685552601 is about 26183.0594278056. The cubic root of 685552601 is about 881.7529628158.

The spelling of 685552601 in words is "six hundred eighty-five million, five hundred fifty-two thousand, six hundred one".