988690289 has 4 divisors (see below), whose sum is σ = 1040726640. Its totient is φ = 936653940.

The previous prime is 988690189. The next prime is 988690309. The reversal of 988690289 is 982096889.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 988690289 - 2⁸ = 988690033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988690189) 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 in 3 ways as a sum of consecutive naturals, for example, 26018147 + ... + 26018184.

It is an arithmetic number, because the mean of its divisors is an integer number (260181660).

Almost surely, 2^988690289 is an apocalyptic number.

It is an amenable number.

988690289 is a deficient number, since it is larger than the sum of its proper divisors (52036351).

988690289 is a wasteful number, since it uses less digits than its factorization.

988690289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52036350.

The product of its (nonzero) digits is 4478976, while the sum is 59.

The square root of 988690289 is about 31443.4458830453. The cubic root of 988690289 is about 996.2157941832.

The spelling of 988690289 in words is "nine hundred eighty-eight million, six hundred ninety thousand, two hundred eighty-nine".