940991 has 8 divisors (see below), whose sum is σ = 982800. Its totient is φ = 900160.

The previous prime is 940981. The next prime is 940993. The reversal of 940991 is 199049.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-940991 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 940991.

It is not an unprimeable number, because it can be changed into a prime (940993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2225 + ... + 2613.

It is an arithmetic number, because the mean of its divisors is an integer number (122850).

2⁹⁴⁰⁹⁹¹ is an apocalyptic number.

940991 is a deficient number, since it is larger than the sum of its proper divisors (41809).

940991 is a wasteful number, since it uses less digits than its factorization.

940991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 940991 is about 970.0469060824. The cubic root of 940991 is about 97.9930232434.

The spelling of 940991 in words is "nine hundred forty thousand, nine hundred ninety-one".