981133 has 2 divisors, whose sum is σ = 981134. Its totient is φ = 981132.

The previous prime is 981091. The next prime is 981137. The reversal of 981133 is 331189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 956484 + 24649 = 978^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 981133 - 2⁹ = 980621 is a prime.

It is a super-3 number, since 3×981133³ = 2833380525300238911, which contains 333 as substring.

981133 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 981098 and 981107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490566 + 490567.

It is an arithmetic number, because the mean of its divisors is an integer number (490567).

2⁹⁸¹¹³³ is an apocalyptic number.

It is an amenable number.

981133 is a deficient number, since it is larger than the sum of its proper divisors (1).

981133 is an equidigital number, since it uses as much as digits as its factorization.

981133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 981133 is about 990.5215797750. The cubic root of 981133 is about 99.3671028626.

The spelling of 981133 in words is "nine hundred eighty-one thousand, one hundred thirty-three".