71803 has 4 divisors (see below), whose sum is σ = 73080. Its totient is φ = 70528.

The previous prime is 71789. The next prime is 71807. The reversal of 71803 is 30817.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71803 - 2¹³ = 63611 is a prime.

It is a Duffinian number.

71803 is a lucky number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (71807) 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, 550 + ... + 667.

It is an arithmetic number, because the mean of its divisors is an integer number (18270).

2⁷¹⁸⁰³ is an apocalyptic number.

71803 is a deficient number, since it is larger than the sum of its proper divisors (1277).

71803 is a wasteful number, since it uses less digits than its factorization.

71803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 71803 is about 267.9608180313. The cubic root of 71803 is about 41.5636995339.

It can be divided in two parts, 7 and 1803, that multiplied together give a palindrome (12621).

The spelling of 71803 in words is "seventy-one thousand, eight hundred three".