988989289 has 2 divisors, whose sum is σ = 988989290. Its totient is φ = 988989288.

The previous prime is 988989277. The next prime is 988989361. The reversal of 988989289 is 982989889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633025600 + 355963689 = 25160^2 + 18867^2 .

It is a cyclic number.

It is not a de Polignac number, because 988989289 - 2¹⁷ = 988858217 is a prime.

It is not a weakly prime, because it can be changed into another prime (988981289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494494644 + 494494645.

It is an arithmetic number, because the mean of its divisors is an integer number (494494645).

Almost surely, 2^988989289 is an apocalyptic number.

It is an amenable number.

988989289 is a deficient number, since it is larger than the sum of its proper divisors (1).

988989289 is an equidigital number, since it uses as much as digits as its factorization.

988989289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53747712, while the sum is 70.

The square root of 988989289 is about 31448.2000915792. The cubic root of 988989289 is about 996.3162093498.

The spelling of 988989289 in words is "nine hundred eighty-eight million, nine hundred eighty-nine thousand, two hundred eighty-nine".