939312091 has 4 divisors (see below), whose sum is σ = 962222184. Its totient is φ = 916402000.

The previous prime is 939312089. The next prime is 939312103. The reversal of 939312091 is 190213939.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 939312091 - 2¹ = 939312089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 939312091.

It is not an unprimeable number, because it can be changed into a prime (939312191) 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, 11454985 + ... + 11455066.

It is an arithmetic number, because the mean of its divisors is an integer number (240555546).

Almost surely, 2^939312091 is an apocalyptic number.

939312091 is a deficient number, since it is larger than the sum of its proper divisors (22910093).

939312091 is a wasteful number, since it uses less digits than its factorization.

939312091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22910092.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 939312091 is about 30648.1988214642. The cubic root of 939312091 is about 979.3470907901.

The spelling of 939312091 in words is "nine hundred thirty-nine million, three hundred twelve thousand, ninety-one".