71077871 has 4 divisors (see below), whose sum is σ = 72243144. Its totient is φ = 69912600.

The previous prime is 71077861. The next prime is 71077873. The reversal of 71077871 is 17877017.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71077871 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 (71077873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582545 + ... + 582666.

It is an arithmetic number, because the mean of its divisors is an integer number (18060786).

Almost surely, 2^71077871 is an apocalyptic number.

71077871 is a deficient number, since it is larger than the sum of its proper divisors (1165273).

71077871 is a wasteful number, since it uses less digits than its factorization.

71077871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165272.

The product of its (nonzero) digits is 19208, while the sum is 38.

The square root of 71077871 is about 8430.7693006036. The cubic root of 71077871 is about 414.2331044286.

The spelling of 71077871 in words is "seventy-one million, seventy-seven thousand, eight hundred seventy-one".