433981 has 2 divisors, whose sum is σ = 433982. Its totient is φ = 433980.

The previous prime is 433967. The next prime is 434009. The reversal of 433981 is 189334.

It is an a-pointer prime, because the next prime (434009) can be obtained adding 433981 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416025 + 17956 = 645^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 433981 - 2⁹ = 433469 is a prime.

It is a super-2 number, since 2×433981² = 376679016722, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (433931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216990 + 216991.

It is an arithmetic number, because the mean of its divisors is an integer number (216991).

2⁴³³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

433981 is a deficient number, since it is larger than the sum of its proper divisors (1).

433981 is an equidigital number, since it uses as much as digits as its factorization.

433981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 433981 is about 658.7723430746. The cubic root of 433981 is about 75.7106379093.

The spelling of 433981 in words is "four hundred thirty-three thousand, nine hundred eighty-one".