981098 has 4 divisors (see below), whose sum is σ = 1471650. Its totient is φ = 490548.

The previous prime is 981091. The next prime is 981133. The reversal of 981098 is 890189.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 890189 = 571 ⋅1559.

It can be written as a sum of positive squares in only one way, i.e., 954529 + 26569 = 977^2 + 163^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (981091) by changing a digit.

981098 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245273 + ... + 245276.

2⁹⁸¹⁰⁹⁸ is an apocalyptic number.

981098 is a deficient number, since it is larger than the sum of its proper divisors (490552).

981098 is a wasteful number, since it uses less digits than its factorization.

981098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490551.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 981098 is about 990.5039121578. The cubic root of 981098 is about 99.3659212728.

Subtracting from 981098 its reverse (890189), we obtain a palindrome (90909).

The spelling of 981098 in words is "nine hundred eighty-one thousand, ninety-eight".