939400091 has 16 divisors (see below), whose sum is σ = 1088452608. Its totient is φ = 794124000.

The previous prime is 939400087. The next prime is 939400097. The reversal of 939400091 is 190004939.

It is a cyclic number.

It is not a de Polignac number, because 939400091 - 2² = 939400087 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (939400097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189146 + ... + 194048.

It is an arithmetic number, because the mean of its divisors is an integer number (68028288).

Almost surely, 2^939400091 is an apocalyptic number.

939400091 is a deficient number, since it is larger than the sum of its proper divisors (149052517).

939400091 is a wasteful number, since it uses less digits than its factorization.

939400091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 939400091 is about 30649.6344350141. The cubic root of 939400091 is about 979.3776734025.

The spelling of 939400091 in words is "nine hundred thirty-nine million, four hundred thousand, ninety-one".