934439021 has 2 divisors, whose sum is σ = 934439022. Its totient is φ = 934439020.

The previous prime is 934438993. The next prime is 934439027. The reversal of 934439021 is 120934439.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 759829225 + 174609796 = 27565^2 + 13214^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-934439021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (934439027) 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, 467219510 + 467219511.

It is an arithmetic number, because the mean of its divisors is an integer number (467219511).

Almost surely, 2^934439021 is an apocalyptic number.

It is an amenable number.

934439021 is a deficient number, since it is larger than the sum of its proper divisors (1).

934439021 is an equidigital number, since it uses as much as digits as its factorization.

934439021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 934439021 is about 30568.5953390076. The cubic root of 934439021 is about 977.6505642142.

The spelling of 934439021 in words is "nine hundred thirty-four million, four hundred thirty-nine thousand, twenty-one".