981137 has 2 divisors, whose sum is σ = 981138. Its totient is φ = 981136.

The previous prime is 981133. The next prime is 981139. The reversal of 981137 is 731189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 952576 + 28561 = 976^2 + 169^2 .

It is an emirp because it is prime and its reverse (731189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981137 - 2² = 981133 is a prime.

Together with 981139, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981137.

It is not a weakly prime, because it can be changed into another prime (981133) 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, 490568 + 490569.

It is an arithmetic number, because the mean of its divisors is an integer number (490569).

2⁹⁸¹¹³⁷ is an apocalyptic number.

It is an amenable number.

981137 is a deficient number, since it is larger than the sum of its proper divisors (1).

981137 is an equidigital number, since it uses as much as digits as its factorization.

981137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 981137 is about 990.5235989112. The cubic root of 981137 is about 99.3672378996.

The spelling of 981137 in words is "nine hundred eighty-one thousand, one hundred thirty-seven".