1021996289 has 16 divisors (see below), whose sum is σ = 1052352000. Its totient is φ = 992173056.

The previous prime is 1021996273. The next prime is 1021996303. The reversal of 1021996289 is 9826991201.

1021996289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1021996289 - 2⁴ = 1021996273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021996229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2275937 + ... + 2276385.

It is an arithmetic number, because the mean of its divisors is an integer number (65772000).

Almost surely, 2^1021996289 is an apocalyptic number.

It is an amenable number.

1021996289 is a deficient number, since it is larger than the sum of its proper divisors (30355711).

1021996289 is a wasteful number, since it uses less digits than its factorization.

1021996289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 1021996289 is about 31968.6766851554. The cubic root of 1021996289 is about 1007.2789841672.

The spelling of 1021996289 in words is "one billion, twenty-one million, nine hundred ninety-six thousand, two hundred eighty-nine".