3543993 has 10 divisors (see below), whose sum is σ = 5294234. Its totient is φ = 2362608.

The previous prime is 3543983. The next prime is 3543997. The reversal of 3543993 is 3993453.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2985984 + 558009 = 1728^2 + 747^2 .

It is not a de Polignac number, because 3543993 - 2⁸ = 3543737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3543997) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 21796 + ... + 21957.

Almost surely, 2^3543993 is an apocalyptic number.

It is an amenable number.

3543993 is a deficient number, since it is larger than the sum of its proper divisors (1750241).

3543993 is an equidigital number, since it uses as much as digits as its factorization.

3543993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43765 (or 43756 counting only the distinct ones).

The product of its digits is 43740, while the sum is 36.

The square root of 3543993 is about 1882.5496009402. The cubic root of 3543993 is about 152.4629382301.

The spelling of 3543993 in words is "three million, five hundred forty-three thousand, nine hundred ninety-three".