71834781 has 16 divisors (see below), whose sum is σ = 99330560. Its totient is φ = 46128960.

The previous prime is 71834761. The next prime is 71834803. The reversal of 71834781 is 18743817.

It is not a de Polignac number, because 71834781 - 2¹⁰ = 71833757 is a prime.

It is a super-2 number, since 2×71834781² = 10320471522635922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71834731) 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 15 ways as a sum of consecutive naturals, for example, 19611 + ... + 22983.

It is an arithmetic number, because the mean of its divisors is an integer number (6208160).

Almost surely, 2^71834781 is an apocalyptic number.

It is an amenable number.

71834781 is a deficient number, since it is larger than the sum of its proper divisors (27495779).

71834781 is a wasteful number, since it uses less digits than its factorization.

71834781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636.

The product of its digits is 37632, while the sum is 39.

The square root of 71834781 is about 8475.5401597774. The cubic root of 71834781 is about 415.6983085192.

The spelling of 71834781 in words is "seventy-one million, eight hundred thirty-four thousand, seven hundred eighty-one".