819125882 has 4 divisors (see below), whose sum is σ = 1228688826. Its totient is φ = 409562940.

The previous prime is 819125863. The next prime is 819125899. The reversal of 819125882 is 288521918.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 627552601 + 191573281 = 25051^2 + 13841^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204781469 + ... + 204781472.

Almost surely, 2^819125882 is an apocalyptic number.

819125882 is a deficient number, since it is larger than the sum of its proper divisors (409562944).

819125882 is a wasteful number, since it uses less digits than its factorization.

819125882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409562943.

The product of its digits is 92160, while the sum is 44.

The square root of 819125882 is about 28620.3752945345. The cubic root of 819125882 is about 935.6574563215.

The spelling of 819125882 in words is "eight hundred nineteen million, one hundred twenty-five thousand, eight hundred eighty-two".