988658089 has 2 divisors, whose sum is σ = 988658090. Its totient is φ = 988658088.

The previous prime is 988658087. The next prime is 988658119. The reversal of 988658089 is 980856889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 821395600 + 167262489 = 28660^2 + 12933^2 .

It is a cyclic number.

It is not a de Polignac number, because 988658089 - 2¹ = 988658087 is a prime.

Together with 988658087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (988658087) 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 as a sum of consecutive naturals, namely, 494329044 + 494329045.

It is an arithmetic number, because the mean of its divisors is an integer number (494329045).

Almost surely, 2^988658089 is an apocalyptic number.

It is an amenable number.

988658089 is a deficient number, since it is larger than the sum of its proper divisors (1).

988658089 is an equidigital number, since it uses as much as digits as its factorization.

988658089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9953280, while the sum is 61.

The square root of 988658089 is about 31442.9338484818. The cubic root of 988658089 is about 996.2049790347.

The spelling of 988658089 in words is "nine hundred eighty-eight million, six hundred fifty-eight thousand, eighty-nine".