2903993 has 4 divisors (see below), whose sum is σ = 2917968. Its totient is φ = 2890020.

The previous prime is 2903969. The next prime is 2904001. The reversal of 2903993 is 3993092.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2903993 - 2⁸ = 2903737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2903933) 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, 6671 + ... + 7092.

It is an arithmetic number, because the mean of its divisors is an integer number (729492).

2^2903993 is an apocalyptic number.

It is an amenable number.

2903993 is a deficient number, since it is larger than the sum of its proper divisors (13975).

2903993 is a wasteful number, since it uses less digits than its factorization.

2903993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13974.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 2903993 is about 1704.1106184752. The cubic root of 2903993 is about 142.6697351608.

The spelling of 2903993 in words is "two million, nine hundred three thousand, nine hundred ninety-three".