2109403 has 2 divisors, whose sum is σ = 2109404. Its totient is φ = 2109402.

The previous prime is 2109391. The next prime is 2109421. The reversal of 2109403 is 3049012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2109403 - 2²¹ = 12251 is a prime.

It is not a weakly prime, because it can be changed into another prime (2109103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054701 + 1054702.

It is an arithmetic number, because the mean of its divisors is an integer number (1054702).

2^2109403 is an apocalyptic number.

2109403 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109403 is an equidigital number, since it uses as much as digits as its factorization.

2109403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2109403 is about 1452.3783942210. The cubic root of 2109403 is about 128.2487634569.

The spelling of 2109403 in words is "two million, one hundred nine thousand, four hundred three".