2391403 has 4 divisors (see below), whose sum is σ = 2733040. Its totient is φ = 2049768.

The previous prime is 2391401. The next prime is 2391437. The reversal of 2391403 is 3041932.

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

It is not a de Polignac number, because 2391403 - 2¹ = 2391401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2391401) 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, 170808 + ... + 170821.

It is an arithmetic number, because the mean of its divisors is an integer number (683260).

2^2391403 is an apocalyptic number.

2391403 is a deficient number, since it is larger than the sum of its proper divisors (341637).

2391403 is an equidigital number, since it uses as much as digits as its factorization.

2391403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341636.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 2391403 is about 1546.4161794291. The cubic root of 2391403 is about 133.7265344457.

The spelling of 2391403 in words is "two million, three hundred ninety-one thousand, four hundred three".