743903 has 4 divisors (see below), whose sum is σ = 787680. Its totient is φ = 700128.

The previous prime is 743891. The next prime is 743917. The reversal of 743903 is 309347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 309347 = 71 ⋅4357.

It is not a de Polignac number, because 743903 - 2¹⁶ = 678367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21863 + ... + 21896.

It is an arithmetic number, because the mean of its divisors is an integer number (196920).

2⁷⁴³⁹⁰³ is an apocalyptic number.

743903 is a deficient number, since it is larger than the sum of its proper divisors (43777).

743903 is a wasteful number, since it uses less digits than its factorization.

743903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43776.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 743903 is about 862.4981159400. The cubic root of 743903 is about 90.6091598157.

The spelling of 743903 in words is "seven hundred forty-three thousand, nine hundred three".