981543903 has 8 divisors (see below), whose sum is σ = 1328258688. Its totient is φ = 644595864.

The previous prime is 981543839. The next prime is 981543919. The reversal of 981543903 is 309345189.

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

It is not a de Polignac number, because 981543903 - 2⁶ = 981543839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981543923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2441451 + ... + 2441852.

It is an arithmetic number, because the mean of its divisors is an integer number (166032336).

Almost surely, 2^981543903 is an apocalyptic number.

981543903 is a deficient number, since it is larger than the sum of its proper divisors (346714785).

981543903 is a wasteful number, since it uses less digits than its factorization.

981543903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4883373.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 981543903 is about 31329.6010667228. The cubic root of 981543903 is about 993.8097272594.

The spelling of 981543903 in words is "nine hundred eighty-one million, five hundred forty-three thousand, nine hundred three".