71207613 has 16 divisors (see below), whose sum is σ = 107947840. Its totient is φ = 46366992.

The previous prime is 71207597. The next prime is 71207621. The reversal of 71207613 is 31670217.

It is not a de Polignac number, because 71207613 - 2⁴ = 71207597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71207623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29506 + ... + 31827.

It is an arithmetic number, because the mean of its divisors is an integer number (6746740).

Almost surely, 2^71207613 is an apocalyptic number.

It is an amenable number.

71207613 is a deficient number, since it is larger than the sum of its proper divisors (36740227).

71207613 is a wasteful number, since it uses less digits than its factorization.

71207613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61385 (or 61379 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 71207613 is about 8438.4603453474. The cubic root of 71207613 is about 414.4849913784.

The spelling of 71207613 in words is "seventy-one million, two hundred seven thousand, six hundred thirteen".