889519681 has 2 divisors, whose sum is σ = 889519682. Its totient is φ = 889519680.

The previous prime is 889519669. The next prime is 889519693. The reversal of 889519681 is 186915988.

It is a balanced prime because it is at equal distance from previous prime (889519669) and next prime (889519693).

It can be written as a sum of positive squares in only one way, i.e., 568393281 + 321126400 = 23841^2 + 17920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889519681 is a prime.

It is a super-2 number, since 2×889519681² = 1582490525772683522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (889519601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444759840 + 444759841.

It is an arithmetic number, because the mean of its divisors is an integer number (444759841).

Almost surely, 2^889519681 is an apocalyptic number.

It is an amenable number.

889519681 is a deficient number, since it is larger than the sum of its proper divisors (1).

889519681 is an equidigital number, since it uses as much as digits as its factorization.

889519681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 55.

The square root of 889519681 is about 29824.8165291926. The cubic root of 889519681 is about 961.7270996720.

The spelling of 889519681 in words is "eight hundred eighty-nine million, five hundred nineteen thousand, six hundred eighty-one".