71903 has 4 divisors (see below), whose sum is σ = 77448. Its totient is φ = 66360.

The previous prime is 71899. The next prime is 71909. The reversal of 71903 is 30917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30917 = 43 ⋅719.

It is a cyclic number.

It is not a de Polignac number, because 71903 - 2² = 71899 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71909) 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, 2753 + ... + 2778.

It is an arithmetic number, because the mean of its divisors is an integer number (19362).

2⁷¹⁹⁰³ is an apocalyptic number.

71903 is a deficient number, since it is larger than the sum of its proper divisors (5545).

71903 is a wasteful number, since it uses less digits than its factorization.

71903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5544.

The product of its (nonzero) digits is 189, while the sum is 20.

The square root of 71903 is about 268.1473475535. The cubic root of 71903 is about 41.5829858307.

The spelling of 71903 in words is "seventy-one thousand, nine hundred three".