2303993 has 8 divisors (see below), whose sum is σ = 2452968. Its totient is φ = 2156544.

The previous prime is 2303989. The next prime is 2303999. The reversal of 2303993 is 3993032.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2704 + 2301289 = 52^2 + 1517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2303993 - 2² = 2303989 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 (2303999) 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 7 ways as a sum of consecutive naturals, for example, 5105 + ... + 5537.

It is an arithmetic number, because the mean of its divisors is an integer number (306621).

2^2303993 is an apocalyptic number.

It is an amenable number.

2303993 is a deficient number, since it is larger than the sum of its proper divisors (148975).

2303993 is a wasteful number, since it uses less digits than its factorization.

2303993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763.

The product of its (nonzero) digits is 4374, while the sum is 29.

The square root of 2303993 is about 1517.8909710516. The cubic root of 2303993 is about 132.0769561970.

It can be divided in two parts, 23039 and 93, that added together give a palindrome (23132).

The spelling of 2303993 in words is "two million, three hundred three thousand, nine hundred ninety-three".