819374690 has 8 divisors (see below), whose sum is σ = 1474874460. Its totient is φ = 327749872.

The previous prime is 819374599. The next prime is 819374707. The reversal of 819374690 is 96473918.

It can be written as a sum of positive squares in 2 ways, for example, as 747311569 + 72063121 = 27337^2 + 8489^2 .

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

It is a super-2 number, since 2×819374690² = 1342749765225192200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40968725 + ... + 40968744.

Almost surely, 2^819374690 is an apocalyptic number.

819374690 is a deficient number, since it is larger than the sum of its proper divisors (655499770).

819374690 is a wasteful number, since it uses less digits than its factorization.

819374690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81937476.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 819374690 is about 28624.7216580354. The cubic root of 819374690 is about 935.7521814826.

The spelling of 819374690 in words is "eight hundred nineteen million, three hundred seventy-four thousand, six hundred ninety".