989090218 has 4 divisors (see below), whose sum is σ = 1483635330. Its totient is φ = 494545108.

The previous prime is 989090203. The next prime is 989090227. The reversal of 989090218 is 812090989.

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: 812090989 = 19 ⋅42741631.

It can be written as a sum of positive squares in only one way, i.e., 602849809 + 386240409 = 24553^2 + 19653^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247272553 + ... + 247272556.

Almost surely, 2^989090218 is an apocalyptic number.

989090218 is a deficient number, since it is larger than the sum of its proper divisors (494545112).

989090218 is a wasteful number, since it uses less digits than its factorization.

989090218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494545111.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 989090218 is about 31449.8047370727. The cubic root of 989090218 is about 996.3501004409.

The spelling of 989090218 in words is "nine hundred eighty-nine million, ninety thousand, two hundred eighteen".