819382019 has 2 divisors, whose sum is σ = 819382020. Its totient is φ = 819382018.

The previous prime is 819382009. The next prime is 819382063. The reversal of 819382019 is 910283918.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 819382019 - 2²⁸ = 550946563 is a prime.

It is a super-2 number, since 2×819382019² = 1342773786121032722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (819382009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409691009 + 409691010.

It is an arithmetic number, because the mean of its divisors is an integer number (409691010).

Almost surely, 2^819382019 is an apocalyptic number.

819382019 is a deficient number, since it is larger than the sum of its proper divisors (1).

819382019 is an equidigital number, since it uses as much as digits as its factorization.

819382019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 819382019 is about 28624.8496764612. The cubic root of 819382019 is about 935.7549714587.

The spelling of 819382019 in words is "eight hundred nineteen million, three hundred eighty-two thousand, nineteen".