2173903 has 2 divisors, whose sum is σ = 2173904. Its totient is φ = 2173902.

The previous prime is 2173889. The next prime is 2173907. The reversal of 2173903 is 3093712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2173903 - 2¹³ = 2165711 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2173907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086951 + 1086952.

It is an arithmetic number, because the mean of its divisors is an integer number (1086952).

2^2173903 is an apocalyptic number.

2173903 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173903 is an equidigital number, since it uses as much as digits as its factorization.

2173903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 2173903 is about 1474.4161556359. The cubic root of 2173903 is about 129.5428320426.

It can be divided in two parts, 217 and 3903, that multiplied together give a triangular number (846951 = T₁₃₀₁).

The spelling of 2173903 in words is "two million, one hundred seventy-three thousand, nine hundred three".