819395995 has 24 divisors (see below), whose sum is σ = 1132118640. Its totient is φ = 564546240.

The previous prime is 819395963. The next prime is 819396001. The reversal of 819395995 is 599593918.

It is not a de Polignac number, because 819395995 - 2⁵ = 819395963 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 780 + ... + 40489.

It is an arithmetic number, because the mean of its divisors is an integer number (47171610).

Almost surely, 2^819395995 is an apocalyptic number.

819395995 is a deficient number, since it is larger than the sum of its proper divisors (312722645).

819395995 is a wasteful number, since it uses less digits than its factorization.

819395995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41323 (or 41304 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 58.

The square root of 819395995 is about 28625.0937989730. The cubic root of 819395995 is about 935.7602917435.

The spelling of 819395995 in words is "eight hundred nineteen million, three hundred ninety-five thousand, nine hundred ninety-five".