481916981 has 8 divisors (see below), whose sum is σ = 593128704. Its totient is φ = 381296880.

The previous prime is 481916977. The next prime is 481917001. The reversal of 481916981 is 189619184.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 481916981 - 2² = 481916977 is a prime.

It is a super-2 number, since 2×481916981² = 464487953152308722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (481916951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2647805 + ... + 2647986.

It is an arithmetic number, because the mean of its divisors is an integer number (74141088).

Almost surely, 2^481916981 is an apocalyptic number.

It is an amenable number.

481916981 is a deficient number, since it is larger than the sum of its proper divisors (111211723).

481916981 is a wasteful number, since it uses less digits than its factorization.

481916981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5295811.

The product of its digits is 124416, while the sum is 47.

The square root of 481916981 is about 21952.6076127644. The cubic root of 481916981 is about 784.0144669038.

The spelling of 481916981 in words is "four hundred eighty-one million, nine hundred sixteen thousand, nine hundred eighty-one".