881180981 has 2 divisors, whose sum is σ = 881180982. Its totient is φ = 881180980.

The previous prime is 881180969. The next prime is 881180987. The reversal of 881180981 is 189081188.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 878588881 + 2592100 = 29641^2 + 1610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-881180981 is a prime.

It is a super-2 number, since 2×881180981² = 1552959842552244722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881180987) 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, 440590490 + 440590491.

It is an arithmetic number, because the mean of its divisors is an integer number (440590491).

Almost surely, 2^881180981 is an apocalyptic number.

It is an amenable number.

881180981 is a deficient number, since it is larger than the sum of its proper divisors (1).

881180981 is an equidigital number, since it uses as much as digits as its factorization.

881180981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 44.

The square root of 881180981 is about 29684.6927051637. The cubic root of 881180981 is about 958.7124597751.

The spelling of 881180981 in words is "eight hundred eighty-one million, one hundred eighty thousand, nine hundred eighty-one".