481389991 has 4 divisors (see below), whose sum is σ = 481688584. Its totient is φ = 481091400.

The previous prime is 481389989. The next prime is 481390033. The reversal of 481389991 is 199983184.

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 481389991 - 2¹ = 481389989 is a prime.

It is a super-3 number, since 3×481389991³ (a number of 27 digits) contains 333 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 (481389911) 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, 146865 + ... + 150106.

It is an arithmetic number, because the mean of its divisors is an integer number (120422146).

Almost surely, 2^481389991 is an apocalyptic number.

481389991 is a deficient number, since it is larger than the sum of its proper divisors (298593).

481389991 is a wasteful number, since it uses less digits than its factorization.

481389991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298592.

The product of its digits is 559872, while the sum is 52.

The square root of 481389991 is about 21940.6014274905. The cubic root of 481389991 is about 783.7285819241.

The spelling of 481389991 in words is "four hundred eighty-one million, three hundred eighty-nine thousand, nine hundred ninety-one".