71013657 has 16 divisors (see below), whose sum is σ = 111238848. Its totient is φ = 39727680.

The previous prime is 71013647. The next prime is 71013661. The reversal of 71013657 is 75631017.

It is not a de Polignac number, because 71013657 - 2⁸ = 71013401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71013617) 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 15 ways as a sum of consecutive naturals, for example, 82338 + ... + 83195.

It is an arithmetic number, because the mean of its divisors is an integer number (6952428).

Almost surely, 2^71013657 is an apocalyptic number.

It is an amenable number.

71013657 is a deficient number, since it is larger than the sum of its proper divisors (40225191).

71013657 is a wasteful number, since it uses less digits than its factorization.

71013657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165560.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 71013657 is about 8426.9601280652. The cubic root of 71013657 is about 414.1083230749.

The spelling of 71013657 in words is "seventy-one million, thirteen thousand, six hundred fifty-seven".