71591323 has 2 divisors, whose sum is σ = 71591324. Its totient is φ = 71591322.

The previous prime is 71591321. The next prime is 71591353. The reversal of 71591323 is 32319517.

It is a weak prime.

It is an emirp because it is prime and its reverse (32319517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71591323 - 2¹ = 71591321 is a prime.

Together with 71591321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71591321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35795661 + 35795662.

It is an arithmetic number, because the mean of its divisors is an integer number (35795662).

Almost surely, 2^71591323 is an apocalyptic number.

71591323 is a deficient number, since it is larger than the sum of its proper divisors (1).

71591323 is an equidigital number, since it uses as much as digits as its factorization.

71591323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 31.

The square root of 71591323 is about 8461.1655816442. The cubic root of 71591323 is about 415.2281573111.

The spelling of 71591323 in words is "seventy-one million, five hundred ninety-one thousand, three hundred twenty-three".