81713003 has 4 divisors (see below), whose sum is σ = 81731640. Its totient is φ = 81694368.

The previous prime is 81712991. The next prime is 81713063. The reversal of 81713003 is 30031718.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81713003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81713003.

It is not an unprimeable number, because it can be changed into a prime (81713063) 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, 1268 + ... + 12846.

It is an arithmetic number, because the mean of its divisors is an integer number (20432910).

Almost surely, 2^81713003 is an apocalyptic number.

81713003 is a deficient number, since it is larger than the sum of its proper divisors (18637).

81713003 is a wasteful number, since it uses less digits than its factorization.

81713003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18636.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 81713003 is about 9039.5244897063. The cubic root of 81713003 is about 433.9407052294.

The spelling of 81713003 in words is "eighty-one million, seven hundred thirteen thousand, three".