481009391 has 4 divisors (see below), whose sum is σ = 482797800. Its totient is φ = 479220984.

The previous prime is 481009387. The next prime is 481009393. The reversal of 481009391 is 193900184.

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 481009391 - 2² = 481009387 is a prime.

It is a super-3 number, since 3×481009391³ (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 (481009393) 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, 893801 + ... + 894338.

It is an arithmetic number, because the mean of its divisors is an integer number (120699450).

Almost surely, 2^481009391 is an apocalyptic number.

481009391 is a deficient number, since it is larger than the sum of its proper divisors (1788409).

481009391 is a wasteful number, since it uses less digits than its factorization.

481009391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788408.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 481009391 is about 21931.9262947877. The cubic root of 481009391 is about 783.5219817664.

It can be divided in two parts, 4810093 and 91, that added together give a palindrome (4810184).

The spelling of 481009391 in words is "four hundred eighty-one million, nine thousand, three hundred ninety-one".