71982345 has 8 divisors (see below), whose sum is σ = 115171776. Its totient is φ = 38390576.

The previous prime is 71982343. The next prime is 71982349. The reversal of 71982345 is 54328917.

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

It is a cyclic number.

It is not a de Polignac number, because 71982345 - 2¹ = 71982343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71982343) 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, 2399397 + ... + 2399426.

It is an arithmetic number, because the mean of its divisors is an integer number (14396472).

Almost surely, 2^71982345 is an apocalyptic number.

It is an amenable number.

71982345 is a deficient number, since it is larger than the sum of its proper divisors (43189431).

71982345 is a wasteful number, since it uses less digits than its factorization.

71982345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4798831.

The product of its digits is 60480, while the sum is 39.

The square root of 71982345 is about 8484.2409796045. The cubic root of 71982345 is about 415.9827582382.

It can be divided in two parts, 71982 and 345, that added together give a palindrome (72327).

The spelling of 71982345 in words is "seventy-one million, nine hundred eighty-two thousand, three hundred forty-five".