1084159981 has 2 divisors, whose sum is σ = 1084159982. Its totient is φ = 1084159980.

The previous prime is 1084159963. The next prime is 1084160003. The reversal of 1084159981 is 1899514801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633277225 + 450882756 = 25165^2 + 21234^2 .

It is a cyclic number.

It is not a de Polignac number, because 1084159981 - 2⁹ = 1084159469 is a prime.

It is a super-2 number, since 2×1084159981² = 2350805728803840722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1084159961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542079990 + 542079991.

It is an arithmetic number, because the mean of its divisors is an integer number (542079991).

Almost surely, 2^1084159981 is an apocalyptic number.

It is an amenable number.

1084159981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1084159981 is an equidigital number, since it uses as much as digits as its factorization.

1084159981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 46.

The square root of 1084159981 is about 32926.5847150900. The cubic root of 1084159981 is about 1027.3011890512.

The spelling of 1084159981 in words is "one billion, eighty-four million, one hundred fifty-nine thousand, nine hundred eighty-one".