939427309 has 4 divisors (see below), whose sum is σ = 940350240. Its totient is φ = 938504380.

The previous prime is 939427303. The next prime is 939427343. The reversal of 939427309 is 903724939.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 939427309 - 2¹⁵ = 939394541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939427303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459937 + ... + 461974.

It is an arithmetic number, because the mean of its divisors is an integer number (235087560).

Almost surely, 2^939427309 is an apocalyptic number.

It is an amenable number.

939427309 is a deficient number, since it is larger than the sum of its proper divisors (922931).

939427309 is a wasteful number, since it uses less digits than its factorization.

939427309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922930.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 939427309 is about 30650.0784501443. The cubic root of 939427309 is about 979.3871320788.

The spelling of 939427309 in words is "nine hundred thirty-nine million, four hundred twenty-seven thousand, three hundred nine".