988634819 has 4 divisors (see below), whose sum is σ = 989606040. Its totient is φ = 987663600.

The previous prime is 988634749. The next prime is 988634827. The reversal of 988634819 is 918436889.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918436889 = 103 ⋅8916863.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-988634819 is a prime.

It is a super-2 number, since 2×988634819² = 1954797610678325522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988634879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484082 + ... + 486119.

It is an arithmetic number, because the mean of its divisors is an integer number (247401510).

Almost surely, 2^988634819 is an apocalyptic number.

988634819 is a deficient number, since it is larger than the sum of its proper divisors (971221).

988634819 is a wasteful number, since it uses less digits than its factorization.

988634819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 971220.

The product of its digits is 2985984, while the sum is 56.

The square root of 988634819 is about 31442.5638108600. The cubic root of 988634819 is about 996.1971630965.

The spelling of 988634819 in words is "nine hundred eighty-eight million, six hundred thirty-four thousand, eight hundred nineteen".