71157887 has 4 divisors (see below), whose sum is σ = 71369376. Its totient is φ = 70946400.

The previous prime is 71157881. The next prime is 71157893. The reversal of 71157887 is 78875117.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (71157881) and next prime (71157893).

It is a cyclic number.

It is not a de Polignac number, because 71157887 - 2²⁰ = 70109311 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 (71157881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105239 + ... + 105912.

It is an arithmetic number, because the mean of its divisors is an integer number (17842344).

Almost surely, 2^71157887 is an apocalyptic number.

71157887 is a deficient number, since it is larger than the sum of its proper divisors (211489).

71157887 is a wasteful number, since it uses less digits than its factorization.

71157887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211488.

The product of its digits is 109760, while the sum is 44.

The square root of 71157887 is about 8435.5134402122. The cubic root of 71157887 is about 414.3884872766.

The spelling of 71157887 in words is "seventy-one million, one hundred fifty-seven thousand, eight hundred eighty-seven".