819202897 has 2 divisors, whose sum is σ = 819202898. Its totient is φ = 819202896.

The previous prime is 819202873. The next prime is 819202957. The reversal of 819202897 is 798202918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 799701841 + 19501056 = 28279^2 + 4416^2 .

It is a cyclic number.

It is not a de Polignac number, because 819202897 - 2²³ = 810814289 is a prime.

It is not a weakly prime, because it can be changed into another prime (819202297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409601448 + 409601449.

It is an arithmetic number, because the mean of its divisors is an integer number (409601449).

Almost surely, 2^819202897 is an apocalyptic number.

It is an amenable number.

819202897 is a deficient number, since it is larger than the sum of its proper divisors (1).

819202897 is an equidigital number, since it uses as much as digits as its factorization.

819202897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 819202897 is about 28621.7207204598. The cubic root of 819202897 is about 935.6867792059.

The spelling of 819202897 in words is "eight hundred nineteen million, two hundred two thousand, eight hundred ninety-seven".