71708057 has 8 divisors (see below), whose sum is σ = 77778792. Its totient is φ = 65843200.

The previous prime is 71708017. The next prime is 71708059. The reversal of 71708057 is 75080717.

It can be written as a sum of positive squares in 4 ways, for example, as 15217801 + 56490256 = 3901^2 + 7516^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71708057 - 2²⁰ = 70659481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71708059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50744 + ... + 52137.

It is an arithmetic number, because the mean of its divisors is an integer number (9722349).

Almost surely, 2^71708057 is an apocalyptic number.

It is an amenable number.

71708057 is a deficient number, since it is larger than the sum of its proper divisors (6070735).

71708057 is a wasteful number, since it uses less digits than its factorization.

71708057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102939.

The product of its (nonzero) digits is 13720, while the sum is 35.

The square root of 71708057 is about 8468.0609941119. The cubic root of 71708057 is about 415.4537196671.

The spelling of 71708057 in words is "seventy-one million, seven hundred eight thousand, fifty-seven".