943921 has 12 divisors (see below), whose sum is σ = 1077300. Its totient is φ = 825440.

The previous prime is 943913. The next prime is 943931. The reversal of 943921 is 129349.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 698896 = 495^2 + 836^2 .

It is not a de Polignac number, because 943921 - 2³ = 943913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 943921.

It is not an unprimeable number, because it can be changed into a prime (943931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3375 + ... + 3643.

It is an arithmetic number, because the mean of its divisors is an integer number (89775).

2⁹⁴³⁹²¹ is an apocalyptic number.

It is an amenable number.

943921 is a deficient number, since it is larger than the sum of its proper divisors (133379).

943921 is a wasteful number, since it uses less digits than its factorization.

943921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320 (or 309 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 943921 is about 971.5559685371. Note that the first 3 decimals coincide. The cubic root of 943921 is about 98.0946260811.

The spelling of 943921 in words is "nine hundred forty-three thousand, nine hundred twenty-one".