71091313 has 4 divisors (see below), whose sum is σ = 71108928. Its totient is φ = 71073700.

The previous prime is 71091301. The next prime is 71091337. The reversal of 71091313 is 31319017.

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 71091313 - 2⁵ = 71091281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71091343) 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, 588 + ... + 11938.

It is an arithmetic number, because the mean of its divisors is an integer number (17777232).

Almost surely, 2^71091313 is an apocalyptic number.

It is an amenable number.

71091313 is a deficient number, since it is larger than the sum of its proper divisors (17615).

71091313 is a wasteful number, since it uses less digits than its factorization.

71091313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17614.

The product of its (nonzero) digits is 567, while the sum is 25.

The square root of 71091313 is about 8431.5664618148. The cubic root of 71091313 is about 414.2592155578.

The spelling of 71091313 in words is "seventy-one million, ninety-one thousand, three hundred thirteen".