71323291 has 4 divisors (see below), whose sum is σ = 76809712. Its totient is φ = 65836872.

The previous prime is 71323249. The next prime is 71323303. The reversal of 71323291 is 19232317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19232317 = 13 ⋅1479409.

It is a cyclic number.

It is not a de Polignac number, because 71323291 - 2²⁵ = 37768859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71323991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2743191 + ... + 2743216.

It is an arithmetic number, because the mean of its divisors is an integer number (19202428).

Almost surely, 2^71323291 is an apocalyptic number.

71323291 is a deficient number, since it is larger than the sum of its proper divisors (5486421).

71323291 is a wasteful number, since it uses less digits than its factorization.

71323291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486420.

The product of its digits is 2268, while the sum is 28.

The square root of 71323291 is about 8445.3117763644. The cubic root of 71323291 is about 414.7093159637.

The spelling of 71323291 in words is "seventy-one million, three hundred twenty-three thousand, two hundred ninety-one".