943861 has 4 divisors (see below), whose sum is σ = 966924. Its totient is φ = 920800.

The previous prime is 943849. The next prime is 943871. The reversal of 943861 is 168349.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168349 = 79 ⋅2131.

It can be written as a sum of positive squares in 2 ways, for example, as 78961 + 864900 = 281^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 943861 - 2¹¹ = 941813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (943801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11470 + ... + 11551.

It is an arithmetic number, because the mean of its divisors is an integer number (241731).

2⁹⁴³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

943861 is a deficient number, since it is larger than the sum of its proper divisors (23063).

943861 is a wasteful number, since it uses less digits than its factorization.

943861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23062.

The product of its digits is 5184, while the sum is 31.

The square root of 943861 is about 971.5250897429. The cubic root of 943861 is about 98.0925475871.

The spelling of 943861 in words is "nine hundred forty-three thousand, eight hundred sixty-one".