988439893 has 4 divisors (see below), whose sum is σ = 1129645600. Its totient is φ = 847234188.

The previous prime is 988439887. The next prime is 988439909. The reversal of 988439893 is 398934889.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 398934889 = 809 ⋅493121.

It is a cyclic number.

It is not a de Polignac number, because 988439893 - 2⁵ = 988439861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988439293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70602843 + ... + 70602856.

It is an arithmetic number, because the mean of its divisors is an integer number (282411400).

Almost surely, 2^988439893 is an apocalyptic number.

It is an amenable number.

988439893 is a deficient number, since it is larger than the sum of its proper divisors (141205707).

988439893 is a wasteful number, since it uses less digits than its factorization.

988439893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141205706.

The product of its digits is 13436928, while the sum is 61.

The square root of 988439893 is about 31439.4639426311. The cubic root of 988439893 is about 996.1316864452.

The spelling of 988439893 in words is "nine hundred eighty-eight million, four hundred thirty-nine thousand, eight hundred ninety-three".