686793944297 has 2 divisors, whose sum is σ = 686793944298. Its totient is φ = 686793944296.

The previous prime is 686793944189. The next prime is 686793944321. The reversal of 686793944297 is 792449397686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420920678656 + 265873265641 = 648784^2 + 515629^2 .

It is a cyclic number.

It is not a de Polignac number, because 686793944297 - 2²⁴ = 686777167081 is a prime.

It is not a weakly prime, because it can be changed into another prime (686793944597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343396972148 + 343396972149.

It is an arithmetic number, because the mean of its divisors is an integer number (343396972149).

Almost surely, 2^686793944297 is an apocalyptic number.

It is an amenable number.

686793944297 is a deficient number, since it is larger than the sum of its proper divisors (1).

686793944297 is an equidigital number, since it uses as much as digits as its factorization.

686793944297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987614208, while the sum is 74.

The spelling of 686793944297 in words is "six hundred eighty-six billion, seven hundred ninety-three million, nine hundred forty-four thousand, two hundred ninety-seven".