988828891 has 2 divisors, whose sum is σ = 988828892. Its totient is φ = 988828890.

The previous prime is 988828889. The next prime is 988828927. The reversal of 988828891 is 198828889.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 988828891 - 2¹ = 988828889 is a prime.

Together with 988828889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (988828871) 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 as a sum of consecutive naturals, namely, 494414445 + 494414446.

It is an arithmetic number, because the mean of its divisors is an integer number (494414446).

Almost surely, 2^988828891 is an apocalyptic number.

988828891 is a deficient number, since it is larger than the sum of its proper divisors (1).

988828891 is an equidigital number, since it uses as much as digits as its factorization.

988828891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5308416, while the sum is 61.

The square root of 988828891 is about 31445.6497945264. The cubic root of 988828891 is about 996.2623443352.

The spelling of 988828891 in words is "nine hundred eighty-eight million, eight hundred twenty-eight thousand, eight hundred ninety-one".