981730143 has 12 divisors (see below), whose sum is σ = 1421801160. Its totient is φ = 652757616.

The previous prime is 981730121. The next prime is 981730147. The reversal of 981730143 is 341037189.

It is a happy number.

It is not a de Polignac number, because 981730143 - 2⁵ = 981730111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981730098 and 981730107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981730147) 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, 140496 + ... + 147317.

It is an arithmetic number, because the mean of its divisors is an integer number (118483430).

Almost surely, 2^981730143 is an apocalyptic number.

981730143 is a deficient number, since it is larger than the sum of its proper divisors (440071017).

981730143 is a wasteful number, since it uses less digits than its factorization.

981730143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288198 (or 288195 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 981730143 is about 31332.5731946803. The cubic root of 981730143 is about 993.8725790646.

The spelling of 981730143 in words is "nine hundred eighty-one million, seven hundred thirty thousand, one hundred forty-three".