819939002 has 8 divisors (see below), whose sum is σ = 1302256116. Its totient is φ = 385853632.

The previous prime is 819938971. The next prime is 819939023. The reversal of 819939002 is 200939918.

It can be written as a sum of positive squares in 2 ways, for example, as 808776721 + 11162281 = 28439^2 + 3341^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 12057893 + ... + 12057960.

Almost surely, 2^819939002 is an apocalyptic number.

819939002 is a deficient number, since it is larger than the sum of its proper divisors (482317114).

819939002 is a wasteful number, since it uses less digits than its factorization.

819939002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24115872.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 819939002 is about 28634.5770354654. The cubic root of 819939002 is about 935.9669529874.

The spelling of 819939002 in words is "eight hundred nineteen million, nine hundred thirty-nine thousand, two".