2089889869 has 2 divisors, whose sum is σ = 2089889870. Its totient is φ = 2089889868.

The previous prime is 2089889861. The next prime is 2089889873. The reversal of 2089889869 is 9689889802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2041864969 + 48024900 = 45187^2 + 6930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2089889869 - 2³ = 2089889861 is a prime.

It is a super-2 number, since 2×2089889869² = 8735279329097674322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2089889861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1044944934 + 1044944935.

It is an arithmetic number, because the mean of its divisors is an integer number (1044944935).

Almost surely, 2^2089889869 is an apocalyptic number.

It is an amenable number.

2089889869 is a deficient number, since it is larger than the sum of its proper divisors (1).

2089889869 is an equidigital number, since it uses as much as digits as its factorization.

2089889869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35831808, while the sum is 67.

The square root of 2089889869 is about 45715.3132877814. The cubic root of 2089889869 is about 1278.5208069397.

Subtracting from 2089889869 its sum of digits (67), we obtain a palindrome (2089889802).

The spelling of 2089889869 in words is "two billion, eighty-nine million, eight hundred eighty-nine thousand, eight hundred sixty-nine".