529981 has 2 divisors, whose sum is σ = 529982. Its totient is φ = 529980.

The previous prime is 529979. The next prime is 529987. The reversal of 529981 is 189925.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 4356 = 725^2 + 66^2 .

It is a cyclic number.

It is not a de Polignac number, because 529981 - 2¹ = 529979 is a prime.

It is a super-2 number, since 2×529981² = 561759720722, which contains 22 as substring.

Together with 529979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (529987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 264990 + 264991.

It is an arithmetic number, because the mean of its divisors is an integer number (264991).

2⁵²⁹⁹⁸¹ is an apocalyptic number.

It is an amenable number.

529981 is a deficient number, since it is larger than the sum of its proper divisors (1).

529981 is an equidigital number, since it uses as much as digits as its factorization.

529981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 34.

The square root of 529981 is about 727.9979395575. The cubic root of 529981 is about 80.9257562852.

The spelling of 529981 in words is "five hundred twenty-nine thousand, nine hundred eighty-one".