442903 has 2 divisors, whose sum is σ = 442904. Its totient is φ = 442902.

The previous prime is 442879. The next prime is 442919. The reversal of 442903 is 309244.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442903 is a prime.

442903 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221451 + 221452.

It is an arithmetic number, because the mean of its divisors is an integer number (221452).

2⁴⁴²⁹⁰³ is an apocalyptic number.

442903 is a deficient number, since it is larger than the sum of its proper divisors (1).

442903 is an equidigital number, since it uses as much as digits as its factorization.

442903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 442903 is about 665.5095791948. The cubic root of 442903 is about 76.2259549732.

It can be divided in two parts, 44290 and 3, that multiplied together give a triangular number (132870 = T₅₁₅).

The spelling of 442903 in words is "four hundred forty-two thousand, nine hundred three".