71013 has 4 divisors (see below), whose sum is σ = 94688. Its totient is φ = 47340.

The previous prime is 71011. The next prime is 71023. The reversal of 71013 is 31017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 71013 - 2¹ = 71011 is a prime.

It is a D-number.

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 71013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71011) 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, 11833 + ... + 11838.

It is an arithmetic number, because the mean of its divisors is an integer number (23672).

2⁷¹⁰¹³ is an apocalyptic number.

It is an amenable number.

71013 is a deficient number, since it is larger than the sum of its proper divisors (23675).

71013 is a wasteful number, since it uses less digits than its factorization.

71013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23674.

The product of its (nonzero) digits is 21, while the sum is 12.

The square root of 71013 is about 266.4826448383. The cubic root of 71013 is about 41.4107045997.

The spelling of 71013 in words is "seventy-one thousand, thirteen".