943993 has 4 divisors (see below), whose sum is σ = 999540. Its totient is φ = 888448.

The previous prime is 943967. The next prime is 944003. The reversal of 943993 is 399349.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 283024 + 660969 = 532^2 + 813^2 .

It is a cyclic number.

It is not a de Polignac number, because 943993 - 2¹⁷ = 812921 is a prime.

It is a super-2 number, since 2×943993² = 1782245568098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (943903) 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, 27748 + ... + 27781.

It is an arithmetic number, because the mean of its divisors is an integer number (249885).

2⁹⁴³⁹⁹³ is an apocalyptic number.

It is an amenable number.

943993 is a deficient number, since it is larger than the sum of its proper divisors (55547).

943993 is a wasteful number, since it uses less digits than its factorization.

943993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55546.

The product of its digits is 26244, while the sum is 37.

The square root of 943993 is about 971.5930217946. The cubic root of 943993 is about 98.0971201576.

Subtracting from 943993 its reverse (399349), we obtain a square (544644 = 738²).

It can be divided in two parts, 943 and 993, that added together give a square (1936 = 44²).

The spelling of 943993 in words is "nine hundred forty-three thousand, nine hundred ninety-three".