8906437889 has 2 divisors, whose sum is σ = 8906437890. Its totient is φ = 8906437888.

The previous prime is 8906437879. The next prime is 8906437931. The reversal of 8906437889 is 9887346098.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7463577664 + 1442860225 = 86392^2 + 37985^2 .

It is a cyclic number.

It is not a de Polignac number, because 8906437889 - 2⁴ = 8906437873 is a prime.

It is a super-2 number, since 2×8906437889² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8906437829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4453218944 + 4453218945.

It is an arithmetic number, because the mean of its divisors is an integer number (4453218945).

Almost surely, 2^8906437889 is an apocalyptic number.

It is an amenable number.

8906437889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8906437889 is an equidigital number, since it uses as much as digits as its factorization.

8906437889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 62.

The square root of 8906437889 is about 94373.9258958744. The cubic root of 8906437889 is about 2072.8506617566.

The spelling of 8906437889 in words is "eight billion, nine hundred six million, four hundred thirty-seven thousand, eight hundred eighty-nine".