71107057 has 4 divisors (see below), whose sum is σ = 81265216. Its totient is φ = 60948900.

The previous prime is 71107051. The next prime is 71107093. The reversal of 71107057 is 75070117.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71107057 is a prime.

It is the 8433-rd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71107051) by changing a digit.

It is a nontrivial repunit in base 8432.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5079069 + ... + 5079082.

It is an arithmetic number, because the mean of its divisors is an integer number (20316304).

Almost surely, 2^71107057 is an apocalyptic number.

It is an amenable number.

71107057 is a deficient number, since it is larger than the sum of its proper divisors (10158159).

71107057 is a wasteful number, since it uses less digits than its factorization.

71107057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10158158.

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

The square root of 71107057 is about 8432.5000444708. The cubic root of 71107057 is about 414.2897941447.

The spelling of 71107057 in words is "seventy-one million, one hundred seven thousand, fifty-seven".