988555189 has 2 divisors, whose sum is σ = 988555190. Its totient is φ = 988555188.

The previous prime is 988555171. The next prime is 988555193. The reversal of 988555189 is 981555889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748460164 + 240095025 = 27358^2 + 15495^2 .

It is a cyclic number.

It is not a de Polignac number, because 988555189 - 2¹³ = 988546997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988555289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494277594 + 494277595.

It is an arithmetic number, because the mean of its divisors is an integer number (494277595).

Almost surely, 2^988555189 is an apocalyptic number.

It is an amenable number.

988555189 is a deficient number, since it is larger than the sum of its proper divisors (1).

988555189 is an equidigital number, since it uses as much as digits as its factorization.

988555189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184000, while the sum is 58.

The square root of 988555189 is about 31441.2975082136. The cubic root of 988555189 is about 996.1704160076.

The spelling of 988555189 in words is "nine hundred eighty-eight million, five hundred fifty-five thousand, one hundred eighty-nine".