988644939 has 4 divisors (see below), whose sum is σ = 1318193256. Its totient is φ = 659096624.

The previous prime is 988644929. The next prime is 988644941. The reversal of 988644939 is 939446889.

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

It is a cyclic number.

It is not a de Polignac number, because 988644939 - 2⁵ = 988644907 is a prime.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (988644919) 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, 164774154 + ... + 164774159.

It is an arithmetic number, because the mean of its divisors is an integer number (329548314).

Almost surely, 2^988644939 is an apocalyptic number.

988644939 is a deficient number, since it is larger than the sum of its proper divisors (329548317).

988644939 is a wasteful number, since it uses less digits than its factorization.

988644939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329548316.

The product of its digits is 13436928, while the sum is 60.

The square root of 988644939 is about 31442.7247388009. The cubic root of 988644939 is about 996.2005622218.

The spelling of 988644939 in words is "nine hundred eighty-eight million, six hundred forty-four thousand, nine hundred thirty-nine".