71085497 has 4 divisors (see below), whose sum is σ = 81240576. Its totient is φ = 60930420.

The previous prime is 71085491. The next prime is 71085499. The reversal of 71085497 is 79458017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71085497 - 2⁸ = 71085241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71085491) 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, 5077529 + ... + 5077542.

It is an arithmetic number, because the mean of its divisors is an integer number (20310144).

Almost surely, 2^71085497 is an apocalyptic number.

It is an amenable number.

71085497 is a deficient number, since it is larger than the sum of its proper divisors (10155079).

71085497 is a wasteful number, since it uses less digits than its factorization.

71085497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155078.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 71085497 is about 8431.2215603672. The cubic root of 71085497 is about 414.2479183627.

The spelling of 71085497 in words is "seventy-one million, eighty-five thousand, four hundred ninety-seven".