881306981 has 2 divisors, whose sum is σ = 881306982. Its totient is φ = 881306980.

The previous prime is 881306971. The next prime is 881307017. The reversal of 881306981 is 189603188.

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., 865830625 + 15476356 = 29425^2 + 3934^2 .

It is a cyclic number.

It is not a de Polignac number, because 881306981 - 2¹⁸ = 881044837 is a prime.

It is a super-2 number, since 2×881306981² = 1553403989518668722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (881306941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440653490 + 440653491.

It is an arithmetic number, because the mean of its divisors is an integer number (440653491).

Almost surely, 2^881306981 is an apocalyptic number.

It is an amenable number.

881306981 is a deficient number, since it is larger than the sum of its proper divisors (1).

881306981 is an equidigital number, since it uses as much as digits as its factorization.

881306981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 881306981 is about 29686.8149352537. The cubic root of 881306981 is about 958.7581530040.

The spelling of 881306981 in words is "eight hundred eighty-one million, three hundred six thousand, nine hundred eighty-one".