71987833 has 8 divisors (see below), whose sum is σ = 74063808. Its totient is φ = 69938544.

The previous prime is 71987821. The next prime is 71987837. The reversal of 71987833 is 33878917.

It is a happy number.

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 71987833 - 2⁵ = 71987801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71987837) 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 7 ways as a sum of consecutive naturals, for example, 1135 + ... + 12052.

It is an arithmetic number, because the mean of its divisors is an integer number (9257976).

Almost surely, 2^71987833 is an apocalyptic number.

It is an amenable number.

71987833 is a deficient number, since it is larger than the sum of its proper divisors (2075975).

71987833 is a wasteful number, since it uses less digits than its factorization.

71987833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13343.

The product of its digits is 254016, while the sum is 46.

The square root of 71987833 is about 8484.5643965969. The cubic root of 71987833 is about 415.9933296052.

The spelling of 71987833 in words is "seventy-one million, nine hundred eighty-seven thousand, eight hundred thirty-three".