988662209 has 2 divisors, whose sum is σ = 988662210. Its totient is φ = 988662208.

The previous prime is 988662179. The next prime is 988662247. The reversal of 988662209 is 902266889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800890000 + 187772209 = 28300^2 + 13703^2 .

It is a cyclic number.

It is not a de Polignac number, because 988662209 - 2²⁰ = 987613633 is a prime.

It is not a weakly prime, because it can be changed into another prime (988662299) 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, 494331104 + 494331105.

It is an arithmetic number, because the mean of its divisors is an integer number (494331105).

Almost surely, 2^988662209 is an apocalyptic number.

It is an amenable number.

988662209 is a deficient number, since it is larger than the sum of its proper divisors (1).

988662209 is an equidigital number, since it uses as much as digits as its factorization.

988662209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 988662209 is about 31442.9993639284. Note that the first 3 decimals coincide. The cubic root of 988662209 is about 996.2063628494.

The spelling of 988662209 in words is "nine hundred eighty-eight million, six hundred sixty-two thousand, two hundred nine".