481840509 has 4 divisors (see below), whose sum is σ = 642454016. Its totient is φ = 321227004.

The previous prime is 481840477. The next prime is 481840517. The reversal of 481840509 is 905048184.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 481840509 - 2⁵ = 481840477 is a prime.

It is a super-2 number, since 2×481840509² = 464340552226758162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481840559) 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 3 ways as a sum of consecutive naturals, for example, 80306749 + ... + 80306754.

It is an arithmetic number, because the mean of its divisors is an integer number (160613504).

Almost surely, 2^481840509 is an apocalyptic number.

It is an amenable number.

481840509 is a deficient number, since it is larger than the sum of its proper divisors (160613507).

481840509 is a wasteful number, since it uses less digits than its factorization.

481840509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160613506.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 481840509 is about 21950.8657915810. The cubic root of 481840509 is about 783.9729948051.

The spelling of 481840509 in words is "four hundred eighty-one million, eight hundred forty thousand, five hundred nine".