981598869 has 12 divisors (see below), whose sum is σ = 1418558700. Its totient is φ = 654079104.

The previous prime is 981598859. The next prime is 981598879. The reversal of 981598869 is 968895189.

It is an interprime number because it is at equal distance from previous prime (981598859) and next prime (981598879).

It can be written as a sum of positive squares in 2 ways, for example, as 204861969 + 776736900 = 14313^2 + 27870^2 .

It is not a de Polignac number, because 981598869 - 2⁷ = 981598741 is a prime.

It is a super-2 number, since 2×981598869² = 1927072679244158322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981598829) 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 11 ways as a sum of consecutive naturals, for example, 6454 + ... + 44775.

It is an arithmetic number, because the mean of its divisors is an integer number (118213225).

Almost surely, 2^981598869 is an apocalyptic number.

It is an amenable number.

981598869 is a deficient number, since it is larger than the sum of its proper divisors (436959831).

981598869 is a wasteful number, since it uses less digits than its factorization.

981598869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53364 (or 53361 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 63.

The square root of 981598869 is about 31330.4782759536. The cubic root of 981598869 is about 993.8282778733.

The spelling of 981598869 in words is "nine hundred eighty-one million, five hundred ninety-eight thousand, eight hundred sixty-nine".