71343031087 has 4 divisors (see below), whose sum is σ = 75097927480. Its totient is φ = 67588134696.

The previous prime is 71343031043. The next prime is 71343031157. The reversal of 71343031087 is 78013034317.

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-71343031087 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 (71343031027) 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, 1877448168 + ... + 1877448205.

It is an arithmetic number, because the mean of its divisors is an integer number (18774481870).

Almost surely, 2^71343031087 is an apocalyptic number.

71343031087 is a deficient number, since it is larger than the sum of its proper divisors (3754896393).

71343031087 is a wasteful number, since it uses less digits than its factorization.

71343031087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754896392.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 71343031087 in words is "seventy-one billion, three hundred forty-three million, thirty-one thousand, eighty-seven".