981011 has 2 divisors, whose sum is σ = 981012. Its totient is φ = 981010.

The previous prime is 980999. The next prime is 981017. The reversal of 981011 is 110189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981011 - 2¹⁰ = 979987 is a prime.

It is not a weakly prime, because it can be changed into another prime (981017) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490505 + 490506.

It is an arithmetic number, because the mean of its divisors is an integer number (490506).

2⁹⁸¹⁰¹¹ is an apocalyptic number.

981011 is a deficient number, since it is larger than the sum of its proper divisors (1).

981011 is an equidigital number, since it uses as much as digits as its factorization.

981011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 981011 is about 990.4599941441. The cubic root of 981011 is about 99.3629840567.

The spelling of 981011 in words is "nine hundred eighty-one thousand, eleven".