71967389 has 8 divisors (see below), whose sum is σ = 78062880. Its totient is φ = 65951856.

The previous prime is 71967377. The next prime is 71967403. The reversal of 71967389 is 98376917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71967389 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 (71967349) 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 7 ways as a sum of consecutive naturals, for example, 18107 + ... + 21720.

It is an arithmetic number, because the mean of its divisors is an integer number (9757860).

Almost surely, 2^71967389 is an apocalyptic number.

It is an amenable number.

71967389 is a deficient number, since it is larger than the sum of its proper divisors (6095491).

71967389 is a wasteful number, since it uses less digits than its factorization.

71967389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39979.

The product of its digits is 571536, while the sum is 50.

The square root of 71967389 is about 8483.3595349956. The cubic root of 71967389 is about 415.9539462239.

The spelling of 71967389 in words is "seventy-one million, nine hundred sixty-seven thousand, three hundred eighty-nine".