895109989 has 2 divisors, whose sum is σ = 895109990. Its totient is φ = 895109988.

The previous prime is 895109987. The next prime is 895110001. The reversal of 895109989 is 989901598.

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., 824264100 + 70845889 = 28710^2 + 8417^2 .

It is a cyclic number.

It is not a de Polignac number, because 895109989 - 2¹ = 895109987 is a prime.

Together with 895109987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (895109981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447554994 + 447554995.

It is an arithmetic number, because the mean of its divisors is an integer number (447554995).

Almost surely, 2^895109989 is an apocalyptic number.

It is an amenable number.

895109989 is a deficient number, since it is larger than the sum of its proper divisors (1).

895109989 is an equidigital number, since it uses as much as digits as its factorization.

895109989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 58.

The square root of 895109989 is about 29918.3888102284. The cubic root of 895109989 is about 963.7375955872.

It can be divided in two parts, 89510 and 9989, that added together give a palindrome (99499).

The spelling of 895109989 in words is "eight hundred ninety-five million, one hundred nine thousand, nine hundred eighty-nine".