941991 has 4 divisors (see below), whose sum is σ = 1255992. Its totient is φ = 627992.

The previous prime is 941989. The next prime is 941999. The reversal of 941991 is 199149.

941991 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199149 = 3 ⋅66383.

It is a cyclic number.

It is not a de Polignac number, because 941991 - 2¹ = 941989 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (941999) 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, 156996 + ... + 157001.

It is an arithmetic number, because the mean of its divisors is an integer number (313998).

2⁹⁴¹⁹⁹¹ is an apocalyptic number.

941991 is a deficient number, since it is larger than the sum of its proper divisors (314001).

941991 is a wasteful number, since it uses less digits than its factorization.

941991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314000.

The product of its digits is 2916, while the sum is 33.

The square root of 941991 is about 970.5622082072. The cubic root of 941991 is about 98.0277236572.

The spelling of 941991 in words is "nine hundred forty-one thousand, nine hundred ninety-one".