981271983 has 12 divisors (see below), whose sum is σ = 1341059144. Its totient is φ = 638222400.

The previous prime is 981271981. The next prime is 981271987. The reversal of 981271983 is 389172189.

It is not a de Polignac number, because 981271983 - 2¹ = 981271981 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 (981271981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92248 + ... + 102333.

Almost surely, 2^981271983 is an apocalyptic number.

981271983 is a deficient number, since it is larger than the sum of its proper divisors (359787161).

981271983 is a wasteful number, since it uses less digits than its factorization.

981271983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194666 (or 194625 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 981271983 is about 31325.2611002686. The cubic root of 981271983 is about 993.7179461043.

The spelling of 981271983 in words is "nine hundred eighty-one million, two hundred seventy-one thousand, nine hundred eighty-three".