981533894 has 8 divisors (see below), whose sum is σ = 1606146408. Its totient is φ = 446151760.

The previous prime is 981533887. The next prime is 981533899. The reversal of 981533894 is 498335189.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981533899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22307567 + ... + 22307610.

It is an arithmetic number, because the mean of its divisors is an integer number (200768301).

Almost surely, 2^981533894 is an apocalyptic number.

981533894 is a deficient number, since it is larger than the sum of its proper divisors (624612514).

981533894 is a wasteful number, since it uses less digits than its factorization.

981533894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44615190.

The product of its digits is 933120, while the sum is 50.

The square root of 981533894 is about 31329.4413292034. The cubic root of 981533894 is about 993.8063492222.

The spelling of 981533894 in words is "nine hundred eighty-one million, five hundred thirty-three thousand, eight hundred ninety-four".