71968549 has 4 divisors (see below), whose sum is σ = 72330400. Its totient is φ = 71606700.

The previous prime is 71968537. The next prime is 71968573. The reversal of 71968549 is 94586917.

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 71968549 - 2⁹ = 71968037 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 (71968579) 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, 180627 + ... + 181024.

It is an arithmetic number, because the mean of its divisors is an integer number (18082600).

Almost surely, 2^71968549 is an apocalyptic number.

It is an amenable number.

71968549 is a deficient number, since it is larger than the sum of its proper divisors (361851).

71968549 is a wasteful number, since it uses less digits than its factorization.

71968549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361850.

The product of its digits is 544320, while the sum is 49.

The square root of 71968549 is about 8483.4279038606. The cubic root of 71968549 is about 415.9561810508.

The spelling of 71968549 in words is "seventy-one million, nine hundred sixty-eight thousand, five hundred forty-nine".