9061981 has 2 divisors, whose sum is σ = 9061982. Its totient is φ = 9061980.

The previous prime is 9061973. The next prime is 9061991. The reversal of 9061981 is 1891609.

9061981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8820900 + 241081 = 2970^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 9061981 - 2³ = 9061973 is a prime.

It is a super-2 number, since 2×9061981² = 164238999288722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9061991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4530990 + 4530991.

It is an arithmetic number, because the mean of its divisors is an integer number (4530991).

Almost surely, 2^9061981 is an apocalyptic number.

It is an amenable number.

9061981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9061981 is an equidigital number, since it uses as much as digits as its factorization.

9061981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 9061981 is about 3010.3124422558. The cubic root of 9061981 is about 208.4847928303.

The spelling of 9061981 in words is "nine million, sixty-one thousand, nine hundred eighty-one".