4090993 has 4 divisors (see below), whose sum is σ = 4147108. Its totient is φ = 4034880.

The previous prime is 4090991. The next prime is 4090997. The reversal of 4090993 is 3990904.

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 2729104 + 1361889 = 1652^2 + 1167^2 .

It is a cyclic number.

It is not a de Polignac number, because 4090993 - 2¹ = 4090991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4090991) 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, 27948 + ... + 28093.

It is an arithmetic number, because the mean of its divisors is an integer number (1036777).

Almost surely, 2^4090993 is an apocalyptic number.

It is an amenable number.

4090993 is a deficient number, since it is larger than the sum of its proper divisors (56115).

4090993 is an equidigital number, since it uses as much as digits as its factorization.

4090993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56114.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 4090993 is about 2022.6203301658. The cubic root of 4090993 is about 159.9347781043.

The spelling of 4090993 in words is "four million, ninety thousand, nine hundred ninety-three".