71013523 has 4 divisors (see below), whose sum is σ = 81158320. Its totient is φ = 60868728.

The previous prime is 71013479. The next prime is 71013533. The reversal of 71013523 is 32531017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32531017 = 223 ⋅145879.

It is a cyclic number.

It is not a de Polignac number, because 71013523 - 2²¹ = 68916371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71013494 and 71013503.

It is not an unprimeable number, because it can be changed into a prime (71013533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5072388 + ... + 5072401.

It is an arithmetic number, because the mean of its divisors is an integer number (20289580).

Almost surely, 2^71013523 is an apocalyptic number.

71013523 is a deficient number, since it is larger than the sum of its proper divisors (10144797).

71013523 is a wasteful number, since it uses less digits than its factorization.

71013523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144796.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 71013523 is about 8426.9521773889. The cubic root of 71013523 is about 414.1080626060.

The spelling of 71013523 in words is "seventy-one million, thirteen thousand, five hundred twenty-three".