811129079 has 4 divisors (see below), whose sum is σ = 816964680. Its totient is φ = 805293480.

The previous prime is 811129073. The next prime is 811129091. The reversal of 811129079 is 970921118.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 811129079 - 2¹⁶ = 811063543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811129073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2917592 + ... + 2917869.

It is an arithmetic number, because the mean of its divisors is an integer number (204241170).

Almost surely, 2^811129079 is an apocalyptic number.

811129079 is a deficient number, since it is larger than the sum of its proper divisors (5835601).

811129079 is a wasteful number, since it uses less digits than its factorization.

811129079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5835600.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 811129079 is about 28480.3279299941. The cubic root of 811129079 is about 932.6026755053.

The spelling of 811129079 in words is "eight hundred eleven million, one hundred twenty-nine thousand, seventy-nine".