481921009 has 4 divisors (see below), whose sum is σ = 497466880. Its totient is φ = 466375140.

The previous prime is 481920979. The next prime is 481921051. The reversal of 481921009 is 900129184.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-481921009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (481921109) 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, 7772889 + ... + 7772950.

It is an arithmetic number, because the mean of its divisors is an integer number (124366720).

Almost surely, 2^481921009 is an apocalyptic number.

It is an amenable number.

481921009 is a deficient number, since it is larger than the sum of its proper divisors (15545871).

481921009 is a wasteful number, since it uses less digits than its factorization.

481921009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15545870.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 481921009 is about 21952.6993556601. The cubic root of 481921009 is about 784.0166512368.

The spelling of 481921009 in words is "four hundred eighty-one million, nine hundred twenty-one thousand, nine".