989027889 has 4 divisors (see below), whose sum is σ = 1318703856. Its totient is φ = 659351924.

The previous prime is 989027869. The next prime is 989027891. The reversal of 989027889 is 988720989.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 989027889 - 2¹² = 989023793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (989027839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164837979 + ... + 164837984.

It is an arithmetic number, because the mean of its divisors is an integer number (329675964).

Almost surely, 2^989027889 is an apocalyptic number.

It is an amenable number.

989027889 is a deficient number, since it is larger than the sum of its proper divisors (329675967).

989027889 is a wasteful number, since it uses less digits than its factorization.

989027889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329675966.

The product of its (nonzero) digits is 5225472, while the sum is 60.

The square root of 989027889 is about 31448.8137932101. The cubic root of 989027889 is about 996.3291711705.

The spelling of 989027889 in words is "nine hundred eighty-nine million, twenty-seven thousand, eight hundred eighty-nine".