817941097 has 2 divisors, whose sum is σ = 817941098. Its totient is φ = 817941096.

The previous prime is 817941079. The next prime is 817941109. The reversal of 817941097 is 790149718.

Together with previous prime (817941079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 554885136 + 263055961 = 23556^2 + 16219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-817941097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (817941017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408970548 + 408970549.

It is an arithmetic number, because the mean of its divisors is an integer number (408970549).

Almost surely, 2^817941097 is an apocalyptic number.

It is an amenable number.

817941097 is a deficient number, since it is larger than the sum of its proper divisors (1).

817941097 is an equidigital number, since it uses as much as digits as its factorization.

817941097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 817941097 is about 28599.6695260627. The cubic root of 817941097 is about 935.2061264976.

The spelling of 817941097 in words is "eight hundred seventeen million, nine hundred forty-one thousand, ninety-seven".