939393509 has 4 divisors (see below), whose sum is σ = 939513216. Its totient is φ = 939273804.

The previous prime is 939393467. The next prime is 939393583. The reversal of 939393509 is 905393939.

It is a happy number.

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 939393509 - 2²⁴ = 922616293 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 (939393409) 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, 47189 + ... + 64074.

It is an arithmetic number, because the mean of its divisors is an integer number (234878304).

Almost surely, 2^939393509 is an apocalyptic number.

It is an amenable number.

939393509 is a deficient number, since it is larger than the sum of its proper divisors (119707).

939393509 is a wasteful number, since it uses less digits than its factorization.

939393509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119706.

The product of its (nonzero) digits is 885735, while the sum is 50.

The square root of 939393509 is about 30649.5270599727. The cubic root of 939393509 is about 979.3753860282.

The spelling of 939393509 in words is "nine hundred thirty-nine million, three hundred ninety-three thousand, five hundred nine".