71331087 has 8 divisors (see below), whose sum is σ = 95147136. Its totient is φ = 47534552.

The previous prime is 71331067. The next prime is 71331089. The reversal of 71331087 is 78013317.

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 71331087 - 2¹¹ = 71329039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71331089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11878 + ... + 16844.

It is an arithmetic number, because the mean of its divisors is an integer number (11893392).

Almost surely, 2^71331087 is an apocalyptic number.

71331087 is a deficient number, since it is larger than the sum of its proper divisors (23816049).

71331087 is a wasteful number, since it uses less digits than its factorization.

71331087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9757.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 71331087 is about 8445.7733216089. The cubic root of 71331087 is about 414.7244253620.

The spelling of 71331087 in words is "seventy-one million, three hundred thirty-one thousand, eighty-seven".