481809871 has 4 divisors (see below), whose sum is σ = 489976200. Its totient is φ = 473643544.

The previous prime is 481809793. The next prime is 481809877. The reversal of 481809871 is 178908184.

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 481809871 - 2¹⁹ = 481285583 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 (481809877) 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, 4083076 + ... + 4083193.

It is an arithmetic number, because the mean of its divisors is an integer number (122494050).

Almost surely, 2^481809871 is an apocalyptic number.

481809871 is a deficient number, since it is larger than the sum of its proper divisors (8166329).

481809871 is an equidigital number, since it uses as much as digits as its factorization.

481809871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8166328.

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 481809871 is about 21950.1679036858. The cubic root of 481809871 is about 783.9563780524.

The spelling of 481809871 in words is "four hundred eighty-one million, eight hundred nine thousand, eight hundred seventy-one".