939090913 has 4 divisors (see below), whose sum is σ = 954485908. Its totient is φ = 923695920.

The previous prime is 939090881. The next prime is 939090983. The reversal of 939090913 is 319090939.

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

It can be written as a sum of positive squares in 2 ways, for example, as 237529744 + 701561169 = 15412^2 + 26487^2 .

It is a cyclic number.

It is not a de Polignac number, because 939090913 - 2⁵ = 939090881 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 939090913.

It is not an unprimeable number, because it can be changed into a prime (939090983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7697406 + ... + 7697527.

It is an arithmetic number, because the mean of its divisors is an integer number (238621477).

Almost surely, 2^939090913 is an apocalyptic number.

It is an amenable number.

939090913 is a deficient number, since it is larger than the sum of its proper divisors (15394995).

939090913 is a wasteful number, since it uses less digits than its factorization.

939090913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15394994.

The product of its (nonzero) digits is 59049, while the sum is 43.

The square root of 939090913 is about 30644.5902729992. The cubic root of 939090913 is about 979.2702164347.

The spelling of 939090913 in words is "nine hundred thirty-nine million, ninety thousand, nine hundred thirteen".