819004897 has 2 divisors, whose sum is σ = 819004898. Its totient is φ = 819004896.

The previous prime is 819004891. The next prime is 819004943. The reversal of 819004897 is 798400918.

It is a happy number.

It is an a-pointer prime, because the next prime (819004943) can be obtained adding 819004897 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512614881 + 306390016 = 22641^2 + 17504^2 .

It is a cyclic number.

It is not a de Polignac number, because 819004897 - 2¹⁵ = 818972129 is a prime.

It is not a weakly prime, because it can be changed into another prime (819004891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409502448 + 409502449.

It is an arithmetic number, because the mean of its divisors is an integer number (409502449).

Almost surely, 2^819004897 is an apocalyptic number.

It is an amenable number.

819004897 is a deficient number, since it is larger than the sum of its proper divisors (1).

819004897 is an equidigital number, since it uses as much as digits as its factorization.

819004897 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 819004897 is about 28618.2615998946. The cubic root of 819004897 is about 935.6113884771.

The spelling of 819004897 in words is "eight hundred nineteen million, four thousand, eight hundred ninety-seven".