1021300989 has 4 divisors (see below), whose sum is σ = 1361734656. Its totient is φ = 680867324.

The previous prime is 1021300967. The next prime is 1021300997. The reversal of 1021300989 is 9890031201.

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 1021300989 - 2¹² = 1021296893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021300949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170216829 + ... + 170216834.

It is an arithmetic number, because the mean of its divisors is an integer number (340433664).

Almost surely, 2^1021300989 is an apocalyptic number.

It is an amenable number.

1021300989 is a deficient number, since it is larger than the sum of its proper divisors (340433667).

1021300989 is an equidigital number, since it uses as much as digits as its factorization.

1021300989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340433666.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1021300989 is about 31957.8001276684. The cubic root of 1021300989 is about 1007.0505032448.

The spelling of 1021300989 in words is "one billion, twenty-one million, three hundred thousand, nine hundred eighty-nine".