71818063 has 4 divisors (see below), whose sum is σ = 72035368. Its totient is φ = 71600760.

The previous prime is 71818051. The next prime is 71818093. The reversal of 71818063 is 36081817.

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

It is a cyclic number.

It is not a de Polignac number, because 71818063 - 2¹⁷ = 71686991 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 (71818093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108156 + ... + 108817.

It is an arithmetic number, because the mean of its divisors is an integer number (18008842).

Almost surely, 2^71818063 is an apocalyptic number.

71818063 is a deficient number, since it is larger than the sum of its proper divisors (217305).

71818063 is a wasteful number, since it uses less digits than its factorization.

71818063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217304.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 71818063 is about 8474.5538525636. The cubic root of 71818063 is about 415.6660577375. Note that the first 3 decimals are identical.

It can be divided in two parts, 718 and 18063, that added together give a palindrome (18781).

The spelling of 71818063 in words is "seventy-one million, eight hundred eighteen thousand, sixty-three".