71808133 has 8 divisors (see below), whose sum is σ = 73265760. Its totient is φ = 70358640.

The previous prime is 71808131. The next prime is 71808167. The reversal of 71808133 is 33180817.

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 71808133 - 2¹ = 71808131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71808095 and 71808104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71808131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17691 + ... + 21367.

It is an arithmetic number, because the mean of its divisors is an integer number (9158220).

Almost surely, 2^71808133 is an apocalyptic number.

It is an amenable number.

71808133 is a deficient number, since it is larger than the sum of its proper divisors (1457627).

71808133 is a wasteful number, since it uses less digits than its factorization.

71808133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4067.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 71808133 is about 8473.9679607608. The cubic root of 71808133 is about 415.6468993530.

The spelling of 71808133 in words is "seventy-one million, eight hundred eight thousand, one hundred thirty-three".