71985367 has 4 divisors (see below), whose sum is σ = 72102280. Its totient is φ = 71868456.

The previous prime is 71985343. The next prime is 71985371. The reversal of 71985367 is 76358917.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76358917 = 17 ⋅4491701.

It is a cyclic number.

It is not a de Polignac number, because 71985367 - 2¹¹ = 71983319 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 (71980367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57528 + ... + 58765.

It is an arithmetic number, because the mean of its divisors is an integer number (18025570).

Almost surely, 2^71985367 is an apocalyptic number.

71985367 is a deficient number, since it is larger than the sum of its proper divisors (116913).

71985367 is a wasteful number, since it uses less digits than its factorization.

71985367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116912.

The product of its digits is 317520, while the sum is 46.

The square root of 71985367 is about 8484.4190726295. The cubic root of 71985367 is about 415.9885794911.

The spelling of 71985367 in words is "seventy-one million, nine hundred eighty-five thousand, three hundred sixty-seven".