71087897 has 8 divisors (see below), whose sum is σ = 75354912. Its totient is φ = 66830400.

The previous prime is 71087879. The next prime is 71087909. The reversal of 71087897 is 79878017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71087897 - 2⁶ = 71087833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71087837) 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, 18122 + ... + 21692.

It is an arithmetic number, because the mean of its divisors is an integer number (9419364).

Almost surely, 2^71087897 is an apocalyptic number.

It is an amenable number.

71087897 is a deficient number, since it is larger than the sum of its proper divisors (4267015).

71087897 is a wasteful number, since it uses less digits than its factorization.

71087897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4759.

The product of its (nonzero) digits is 197568, while the sum is 47.

The square root of 71087897 is about 8431.3638872961. The cubic root of 71087897 is about 414.2525802785.

The spelling of 71087897 in words is "seventy-one million, eighty-seven thousand, eight hundred ninety-seven".