1021375489 has 2 divisors, whose sum is σ = 1021375490. Its totient is φ = 1021375488.

The previous prime is 1021375483. The next prime is 1021375543. The reversal of 1021375489 is 9845731201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586027264 + 435348225 = 24208^2 + 20865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021375489 - 2¹³ = 1021367297 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021375483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510687744 + 510687745.

It is an arithmetic number, because the mean of its divisors is an integer number (510687745).

Almost surely, 2^1021375489 is an apocalyptic number.

It is an amenable number.

1021375489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021375489 is an equidigital number, since it uses as much as digits as its factorization.

1021375489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1021375489 is about 31958.9657060425. The cubic root of 1021375489 is about 1007.0749894766.

The spelling of 1021375489 in words is "one billion, twenty-one million, three hundred seventy-five thousand, four hundred eighty-nine".