989169994 has 4 divisors (see below), whose sum is σ = 1483754994. Its totient is φ = 494584996.

The previous prime is 989169983. The next prime is 989170027. The reversal of 989169994 is 499961989.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 602064369 + 387105625 = 24537^2 + 19675^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247292497 + ... + 247292500.

Almost surely, 2^989169994 is an apocalyptic number.

989169994 is a deficient number, since it is larger than the sum of its proper divisors (494585000).

989169994 is a wasteful number, since it uses less digits than its factorization.

989169994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494584999.

The product of its digits is 11337408, while the sum is 64.

The square root of 989169994 is about 31451.0730182612. The cubic root of 989169994 is about 996.3768869050.

The spelling of 989169994 in words is "nine hundred eighty-nine million, one hundred sixty-nine thousand, nine hundred ninety-four".