685090600793 has 2 divisors, whose sum is σ = 685090600794. Its totient is φ = 685090600792.

The previous prime is 685090600781. The next prime is 685090600807. The reversal of 685090600793 is 397006090586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 493586338249 + 191504262544 = 702557^2 + 437612^2 .

It is a cyclic number.

It is not a de Polignac number, because 685090600793 - 2¹⁶ = 685090535257 is a prime.

It is not a weakly prime, because it can be changed into another prime (685090606793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342545300396 + 342545300397.

It is an arithmetic number, because the mean of its divisors is an integer number (342545300397).

Almost surely, 2^685090600793 is an apocalyptic number.

It is an amenable number.

685090600793 is a deficient number, since it is larger than the sum of its proper divisors (1).

685090600793 is an equidigital number, since it uses as much as digits as its factorization.

685090600793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 685090600793 in words is "six hundred eighty-five billion, ninety million, six hundred thousand, seven hundred ninety-three".