71957343 has 4 divisors (see below), whose sum is σ = 95943128. Its totient is φ = 47971560.

The previous prime is 71957287. The next prime is 71957357. The reversal of 71957343 is 34375917.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 71957343 - 2⁶ = 71957279 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 (71957143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11992888 + ... + 11992893.

It is an arithmetic number, because the mean of its divisors is an integer number (23985782).

Almost surely, 2^71957343 is an apocalyptic number.

71957343 is a deficient number, since it is larger than the sum of its proper divisors (23985785).

71957343 is a wasteful number, since it uses less digits than its factorization.

71957343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23985784.

The product of its digits is 79380, while the sum is 39.

The square root of 71957343 is about 8482.7674139988. The cubic root of 71957343 is about 415.9345908471.

The spelling of 71957343 in words is "seventy-one million, nine hundred fifty-seven thousand, three hundred forty-three".