71291087 has 8 divisors (see below), whose sum is σ = 83463072. Its totient is φ = 59616000.

The previous prime is 71291027. The next prime is 71291113. The reversal of 71291087 is 78019217.

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 71291087 - 2¹⁸ = 71028943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71291027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123914 + ... + 124487.

It is an arithmetic number, because the mean of its divisors is an integer number (10432884).

Almost surely, 2^71291087 is an apocalyptic number.

71291087 is a deficient number, since it is larger than the sum of its proper divisors (12171985).

71291087 is a wasteful number, since it uses less digits than its factorization.

71291087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248449.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 71291087 is about 8443.4049411360. The cubic root of 71291087 is about 414.6468898417.

The spelling of 71291087 in words is "seventy-one million, two hundred ninety-one thousand, eighty-seven".