71382823 has 4 divisors (see below), whose sum is σ = 74486448. Its totient is φ = 68279200.

The previous prime is 71382781. The next prime is 71382827. The reversal of 71382823 is 32828317.

71382823 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32828317 = 421 ⋅77977.

It is a cyclic number.

It is not a de Polignac number, because 71382823 - 2²⁵ = 37828391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71382827) 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, 1551778 + ... + 1551823.

It is an arithmetic number, because the mean of its divisors is an integer number (18621612).

Almost surely, 2^71382823 is an apocalyptic number.

71382823 is a deficient number, since it is larger than the sum of its proper divisors (3103625).

71382823 is a wasteful number, since it uses less digits than its factorization.

71382823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103624.

The product of its digits is 16128, while the sum is 34.

The square root of 71382823 is about 8448.8356002469. The cubic root of 71382823 is about 414.8246668253.

The spelling of 71382823 in words is "seventy-one million, three hundred eighty-two thousand, eight hundred twenty-three".