981094018 has 4 divisors (see below), whose sum is σ = 1471641030. Its totient is φ = 490547008.

The previous prime is 981093989. The next prime is 981094019. The reversal of 981094018 is 810490189.

981094018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810490189 = 397 ⋅2041537.

It can be written as a sum of positive squares in only one way, i.e., 921911769 + 59182249 = 30363^2 + 7693^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (981094019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245273503 + ... + 245273506.

Almost surely, 2^981094018 is an apocalyptic number.

981094018 is a deficient number, since it is larger than the sum of its proper divisors (490547012).

981094018 is a wasteful number, since it uses less digits than its factorization.

981094018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490547011.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 981094018 is about 31322.4203726340. The cubic root of 981094018 is about 993.6578683992.

It can be divided in two parts, 98 and 1094018, that added together give a square (1094116 = 1046²).

The spelling of 981094018 in words is "nine hundred eighty-one million, ninety-four thousand, eighteen".