694972420817 has 2 divisors, whose sum is σ = 694972420818. Its totient is φ = 694972420816.

The previous prime is 694972420781. The next prime is 694972420867. The reversal of 694972420817 is 718024279496.

694972420817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (694972420781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 627637879696 + 67334541121 = 792236^2 + 259489^2 .

It is a cyclic number.

It is not a de Polignac number, because 694972420817 - 2³⁸ = 420094513873 is a prime.

It is not a weakly prime, because it can be changed into another prime (694972420867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347486210408 + 347486210409.

It is an arithmetic number, because the mean of its divisors is an integer number (347486210409).

Almost surely, 2^694972420817 is an apocalyptic number.

It is an amenable number.

694972420817 is a deficient number, since it is larger than the sum of its proper divisors (1).

694972420817 is an equidigital number, since it uses as much as digits as its factorization.

694972420817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 694972420817 in words is "six hundred ninety-four billion, nine hundred seventy-two million, four hundred twenty thousand, eight hundred seventeen".