940111993 has 4 divisors (see below), whose sum is σ = 940196340. Its totient is φ = 940027648.

The previous prime is 940111987. The next prime is 940112059. The reversal of 940111993 is 399111049.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 280495504 + 659616489 = 16748^2 + 25683^2 .

It is a cyclic number.

It is not a de Polignac number, because 940111993 - 2⁵ = 940111961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (940111903) 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, 22348 + ... + 48781.

It is an arithmetic number, because the mean of its divisors is an integer number (235049085).

Almost surely, 2^940111993 is an apocalyptic number.

It is an amenable number.

940111993 is a deficient number, since it is larger than the sum of its proper divisors (84347).

940111993 is a wasteful number, since it uses less digits than its factorization.

940111993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84346.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 940111993 is about 30661.2457835620. The cubic root of 940111993 is about 979.6250102867.

The spelling of 940111993 in words is "nine hundred forty million, one hundred eleven thousand, nine hundred ninety-three".