881090989 has 2 divisors, whose sum is σ = 881090990. Its totient is φ = 881090988.

The previous prime is 881090981. The next prime is 881091017. The reversal of 881090989 is 989090188.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 876752100 + 4338889 = 29610^2 + 2083^2 .

It is a cyclic number.

It is not a de Polignac number, because 881090989 - 2³ = 881090981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881090981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440545494 + 440545495.

It is an arithmetic number, because the mean of its divisors is an integer number (440545495).

Almost surely, 2^881090989 is an apocalyptic number.

It is an amenable number.

881090989 is a deficient number, since it is larger than the sum of its proper divisors (1).

881090989 is an equidigital number, since it uses as much as digits as its factorization.

881090989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 52.

The square root of 881090989 is about 29683.1768683879. The cubic root of 881090989 is about 958.6798219891.

It can be divided in two parts, 8810 and 90989, that added together give a palindrome (99799).

The spelling of 881090989 in words is "eight hundred eighty-one million, ninety thousand, nine hundred eighty-nine".