920091089 has 2 divisors, whose sum is σ = 920091090. Its totient is φ = 920091088.

The previous prime is 920091037. The next prime is 920091163. The reversal of 920091089 is 980190029.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 910530625 + 9560464 = 30175^2 + 3092^2 .

It is a cyclic number.

It is not a de Polignac number, because 920091089 - 2²⁸ = 651655633 is a prime.

It is a super-2 number, since 2×920091089² = 1693135224114411842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (920091989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460045544 + 460045545.

It is an arithmetic number, because the mean of its divisors is an integer number (460045545).

Almost surely, 2^920091089 is an apocalyptic number.

It is an amenable number.

920091089 is a deficient number, since it is larger than the sum of its proper divisors (1).

920091089 is an equidigital number, since it uses as much as digits as its factorization.

920091089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 920091089 is about 30333.0032967393. The cubic root of 920091089 is about 972.6209237623.

The spelling of 920091089 in words is "nine hundred twenty million, ninety-one thousand, eighty-nine".