981611131 has 2 divisors, whose sum is σ = 981611132. Its totient is φ = 981611130.

The previous prime is 981611123. The next prime is 981611153. The reversal of 981611131 is 131116189.

981611131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981611131 - 2³ = 981611123 is a prime.

It is a super-2 number, since 2×981611131² = 1927120825006198322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 981611093 and 981611102.

It is not a weakly prime, because it can be changed into another prime (981611431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490805565 + 490805566.

It is an arithmetic number, because the mean of its divisors is an integer number (490805566).

Almost surely, 2^981611131 is an apocalyptic number.

981611131 is a deficient number, since it is larger than the sum of its proper divisors (1).

981611131 is an equidigital number, since it uses as much as digits as its factorization.

981611131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 31.

The square root of 981611131 is about 31330.6739633861. The cubic root of 981611131 is about 993.8324161121.

The spelling of 981611131 in words is "nine hundred eighty-one million, six hundred eleven thousand, one hundred thirty-one".