1075889621 has 2 divisors, whose sum is σ = 1075889622. Its totient is φ = 1075889620.

The previous prime is 1075889597. The next prime is 1075889681. The reversal of 1075889621 is 1269885701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620707396 + 455182225 = 24914^2 + 21335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1075889621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1075889681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537944810 + 537944811.

It is an arithmetic number, because the mean of its divisors is an integer number (537944811).

Almost surely, 2^1075889621 is an apocalyptic number.

It is an amenable number.

1075889621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1075889621 is an equidigital number, since it uses as much as digits as its factorization.

1075889621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 1075889621 is about 32800.7564089611. The cubic root of 1075889621 is about 1024.6823115399.

The spelling of 1075889621 in words is "one billion, seventy-five million, eight hundred eighty-nine thousand, six hundred twenty-one".