534666389 has 2 divisors, whose sum is σ = 534666390. Its totient is φ = 534666388.

The previous prime is 534666383. The next prime is 534666397. The reversal of 534666389 is 983666435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529782289 + 4884100 = 23017^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 534666389 - 2⁴ = 534666373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (534666383) 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, 267333194 + 267333195.

It is an arithmetic number, because the mean of its divisors is an integer number (267333195).

Almost surely, 2^534666389 is an apocalyptic number.

It is an amenable number.

534666389 is a deficient number, since it is larger than the sum of its proper divisors (1).

534666389 is an equidigital number, since it uses as much as digits as its factorization.

534666389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 50.

The square root of 534666389 is about 23122.8542572062. The cubic root of 534666389 is about 811.6353634109.

The spelling of 534666389 in words is "five hundred thirty-four million, six hundred sixty-six thousand, three hundred eighty-nine".