1020688289 has 8 divisors (see below), whose sum is σ = 1025351040. Its totient is φ = 1016036496.

The previous prime is 1020688283. The next prime is 1020688297. The reversal of 1020688289 is 9828860201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020688289 - 2¹² = 1020684193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020688283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224927 + ... + 229419.

It is an arithmetic number, because the mean of its divisors is an integer number (128168880).

Almost surely, 2^1020688289 is an apocalyptic number.

It is an amenable number.

1020688289 is a deficient number, since it is larger than the sum of its proper divisors (4662751).

1020688289 is an equidigital number, since it uses as much as digits as its factorization.

1020688289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5479.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 1020688289 is about 31948.2126104106. The cubic root of 1020688289 is about 1006.8490793489.

The spelling of 1020688289 in words is "one billion, twenty million, six hundred eighty-eight thousand, two hundred eighty-nine".