811099994 has 12 divisors (see below), whose sum is σ = 1224523134. Its totient is φ = 402942384.

The previous prime is 811099957. The next prime is 811099999. The reversal of 811099994 is 499990118.

It can be written as a sum of positive squares in 3 ways, for example, as 713584369 + 97515625 = 26713^2 + 9875^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (811099999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41072 + ... + 57524.

Almost surely, 2^811099994 is an apocalyptic number.

811099994 is a deficient number, since it is larger than the sum of its proper divisors (413423140).

811099994 is a wasteful number, since it uses less digits than its factorization.

811099994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16769 (or 16612 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 50.

The square root of 811099994 is about 28479.8173098073. The cubic root of 811099994 is about 932.5915284619.

The spelling of 811099994 in words is "eight hundred eleven million, ninety-nine thousand, nine hundred ninety-four".