811409379 has 8 divisors (see below), whose sum is σ = 1180231872. Its totient is φ = 491763240.

The previous prime is 811409377. The next prime is 811409399. The reversal of 811409379 is 973904118.

It is a happy number.

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

It is not a de Polignac number, because 811409379 - 2¹ = 811409377 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 811409379.

It is not an unprimeable number, because it can be changed into a prime (811409377) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12294049 + ... + 12294114.

It is an arithmetic number, because the mean of its divisors is an integer number (147528984).

Almost surely, 2^811409379 is an apocalyptic number.

811409379 is a deficient number, since it is larger than the sum of its proper divisors (368822493).

811409379 is a wasteful number, since it uses less digits than its factorization.

811409379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24588177.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 811409379 is about 28485.2484454673. The cubic root of 811409379 is about 932.7100889166.

The spelling of 811409379 in words is "eight hundred eleven million, four hundred nine thousand, three hundred seventy-nine".