71070013 has 36 divisors (see below), whose sum is σ = 92984160. Its totient is φ = 53053056.

The previous prime is 71070001. The next prime is 71070017. The reversal of 71070013 is 31007017.

It is a happy number.

It is not a de Polignac number, because 71070013 - 2⁹ = 71069501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71070017) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1652770 + ... + 1652812.

Almost surely, 2^71070013 is an apocalyptic number.

It is an amenable number.

71070013 is a deficient number, since it is larger than the sum of its proper divisors (21914147).

71070013 is a wasteful number, since it uses less digits than its factorization.

71070013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 147, while the sum is 19.

The square root of 71070013 is about 8430.3032567044. The cubic root of 71070013 is about 414.2178387130.

The spelling of 71070013 in words is "seventy-one million, seventy thousand, thirteen".