939534509 has 2 divisors, whose sum is σ = 939534510. Its totient is φ = 939534508.

The previous prime is 939534493. The next prime is 939534517. The reversal of 939534509 is 905435939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 922336900 + 17197609 = 30370^2 + 4147^2 .

It is an emirp because it is prime and its reverse (905435939) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 939534509 - 2⁴ = 939534493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (939534709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469767254 + 469767255.

It is an arithmetic number, because the mean of its divisors is an integer number (469767255).

Almost surely, 2^939534509 is an apocalyptic number.

It is an amenable number.

939534509 is a deficient number, since it is larger than the sum of its proper divisors (1).

939534509 is an equidigital number, since it uses as much as digits as its factorization.

939534509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 656100, while the sum is 47.

The square root of 939534509 is about 30651.8271722911. The cubic root of 939534509 is about 979.4243839613.

The spelling of 939534509 in words is "nine hundred thirty-nine million, five hundred thirty-four thousand, five hundred nine".