817094462981 has 2 divisors, whose sum is σ = 817094462982. Its totient is φ = 817094462980.

The previous prime is 817094462969. The next prime is 817094463067. The reversal of 817094462981 is 189264490718.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 444708928225 + 372385534756 = 666865^2 + 610234^2 .

It is a cyclic number.

It is not a de Polignac number, because 817094462981 - 2⁶ = 817094462917 is a prime.

It is a super-2 number, since 2×817094462981² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 817094462981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (817094462081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408547231490 + 408547231491.

It is an arithmetic number, because the mean of its divisors is an integer number (408547231491).

Almost surely, 2^817094462981 is an apocalyptic number.

It is an amenable number.

817094462981 is a deficient number, since it is larger than the sum of its proper divisors (1).

817094462981 is an equidigital number, since it uses as much as digits as its factorization.

817094462981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 817094462981 in words is "eight hundred seventeen billion, ninety-four million, four hundred sixty-two thousand, nine hundred eighty-one".