989870086 has 4 divisors (see below), whose sum is σ = 1484805132. Its totient is φ = 494935042.

The previous prime is 989870069. The next prime is 989870087. The reversal of 989870086 is 680078989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 680078989 = 19 ⋅35793631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989870087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247467520 + ... + 247467523.

It is an arithmetic number, because the mean of its divisors is an integer number (371201283).

Almost surely, 2^989870086 is an apocalyptic number.

989870086 is a deficient number, since it is larger than the sum of its proper divisors (494935046).

989870086 is a wasteful number, since it uses less digits than its factorization.

989870086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494935045.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The square root of 989870086 is about 31462.2009083916. The cubic root of 989870086 is about 996.6118957136.

The spelling of 989870086 in words is "nine hundred eighty-nine million, eight hundred seventy thousand, eighty-six".