806809994 has 4 divisors (see below), whose sum is σ = 1210214994. Its totient is φ = 403404996.

The previous prime is 806809951. The next prime is 806810003. The reversal of 806809994 is 499908608.

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., 577681225 + 229128769 = 24035^2 + 15137^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201702497 + ... + 201702500.

Almost surely, 2^806809994 is an apocalyptic number.

806809994 is a deficient number, since it is larger than the sum of its proper divisors (403405000).

806809994 is a wasteful number, since it uses less digits than its factorization.

806809994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403404999.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 806809994 is about 28404.4009618228. The cubic root of 806809994 is about 930.9444269621.

The spelling of 806809994 in words is "eight hundred six million, eight hundred nine thousand, nine hundred ninety-four".