981481583 has 4 divisors (see below), whose sum is σ = 981595488. Its totient is φ = 981367680.

The previous prime is 981481561. The next prime is 981481601. The reversal of 981481583 is 385184189.

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 981481583 - 2¹² = 981477487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981480583) 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, 42866 + ... + 61647.

It is an arithmetic number, because the mean of its divisors is an integer number (245398872).

Almost surely, 2^981481583 is an apocalyptic number.

981481583 is a deficient number, since it is larger than the sum of its proper divisors (113905).

981481583 is a wasteful number, since it uses less digits than its factorization.

981481583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113904.

The product of its digits is 276480, while the sum is 47.

The square root of 981481583 is about 31328.6064643801. The cubic root of 981481583 is about 993.7886938878.

The spelling of 981481583 in words is "nine hundred eighty-one million, four hundred eighty-one thousand, five hundred eighty-three".