433013981 has 2 divisors, whose sum is σ = 433013982. Its totient is φ = 433013980.

The previous prime is 433013969. The next prime is 433014011. The reversal of 433013981 is 189310334.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429898756 + 3115225 = 20734^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 433013981 - 2²⁶ = 365905117 is a prime.

It is a super-2 number, since 2×433013981² = 375002215482936722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (433013081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216506990 + 216506991.

It is an arithmetic number, because the mean of its divisors is an integer number (216506991).

Almost surely, 2^433013981 is an apocalyptic number.

It is an amenable number.

433013981 is a deficient number, since it is larger than the sum of its proper divisors (1).

433013981 is an equidigital number, since it uses as much as digits as its factorization.

433013981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 433013981 is about 20808.9879859641. The cubic root of 433013981 is about 756.5436196464.

The spelling of 433013981 in words is "four hundred thirty-three million, thirteen thousand, nine hundred eighty-one".