981189250 has 16 divisors (see below), whose sum is σ = 1836786744. Its totient is φ = 392475600.

The previous prime is 981189247. The next prime is 981189259. The reversal of 981189250 is 52981189.

981189250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 210627169 + 770562081 = 14513^2 + 27759^2 .

It is a junction number, because it is equal to n+sod(n) for n = 981189197 and 981189206.

It is not an unprimeable number, because it can be changed into a prime (981189259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1962129 + ... + 1962628.

Almost surely, 2^981189250 is an apocalyptic number.

981189250 is a deficient number, since it is larger than the sum of its proper divisors (855597494).

981189250 is a wasteful number, since it uses less digits than its factorization.

981189250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924774 (or 3924764 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 43.

The square root of 981189250 is about 31323.9405247807. The cubic root of 981189250 is about 993.6900178714.

The spelling of 981189250 in words is "nine hundred eighty-one million, one hundred eighty-nine thousand, two hundred fifty".