2189093581 has 2 divisors, whose sum is σ = 2189093582. Its totient is φ = 2189093580.

The previous prime is 2189093521. The next prime is 2189093597. The reversal of 2189093581 is 1853909812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1478018025 + 711075556 = 38445^2 + 26666^2 .

It is a cyclic number.

It is not a de Polignac number, because 2189093581 - 2¹³ = 2189085389 is a prime.

It is a super-2 number, since 2×2189093581² = 9584261412750807122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2189093521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094546790 + 1094546791.

It is an arithmetic number, because the mean of its divisors is an integer number (1094546791).

Almost surely, 2^2189093581 is an apocalyptic number.

It is an amenable number.

2189093581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189093581 is an equidigital number, since it uses as much as digits as its factorization.

2189093581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 2189093581 is about 46787.7503306154. The cubic root of 2189093581 is about 1298.4386740879.

The spelling of 2189093581 in words is "two billion, one hundred eighty-nine million, ninety-three thousand, five hundred eighty-one".