71070517 has 4 divisors (see below), whose sum is σ = 81223456. Its totient is φ = 60917580.

The previous prime is 71070511. The next prime is 71070521. The reversal of 71070517 is 71507017.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71507017 = 53 ⋅1349189.

It is a cyclic number.

It is not a de Polignac number, because 71070517 - 2¹¹ = 71068469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71070511) 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, 5076459 + ... + 5076472.

It is an arithmetic number, because the mean of its divisors is an integer number (20305864).

Almost surely, 2^71070517 is an apocalyptic number.

It is an amenable number.

71070517 is a deficient number, since it is larger than the sum of its proper divisors (10152939).

71070517 is a wasteful number, since it uses less digits than its factorization.

71070517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10152938.

The product of its (nonzero) digits is 1715, while the sum is 28.

The square root of 71070517 is about 8430.3331488145. Note that the first 3 decimals coincide. The cubic root of 71070517 is about 414.2188178662.

The spelling of 71070517 in words is "seventy-one million, seventy thousand, five hundred seventeen".