811280479 has 4 divisors (see below), whose sum is σ = 820396080. Its totient is φ = 802164880.

The previous prime is 811280461. The next prime is 811280501. The reversal of 811280479 is 974082118.

It is a happy number.

811280479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 811280479 - 2²⁷ = 677062751 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811280179) 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, 4557667 + ... + 4557844.

It is an arithmetic number, because the mean of its divisors is an integer number (205099020).

Almost surely, 2^811280479 is an apocalyptic number.

811280479 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

811280479 is a deficient number, since it is larger than the sum of its proper divisors (9115601).

811280479 is an equidigital number, since it uses as much as digits as its factorization.

811280479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9115600.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 811280479 is about 28482.9857809886. The cubic root of 811280479 is about 932.6606963821.

The spelling of 811280479 in words is "eight hundred eleven million, two hundred eighty thousand, four hundred seventy-nine".