71816739 has 16 divisors (see below), whose sum is σ = 99185664. Its totient is φ = 46173600.

The previous prime is 71816729. The next prime is 71816753. The reversal of 71816739 is 93761817.

It is not a de Polignac number, because 71816739 - 2²⁰ = 70768163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71816739.

It is not an unprimeable number, because it can be changed into a prime (71816729) 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 15 ways as a sum of consecutive naturals, for example, 29617 + ... + 31949.

It is an arithmetic number, because the mean of its divisors is an integer number (6199104).

Almost surely, 2^71816739 is an apocalyptic number.

71816739 is a deficient number, since it is larger than the sum of its proper divisors (27368925).

71816739 is a wasteful number, since it uses less digits than its factorization.

71816739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698.

The product of its digits is 63504, while the sum is 42.

The square root of 71816739 is about 8474.4757359969. The cubic root of 71816739 is about 415.6635033883.

The spelling of 71816739 in words is "seventy-one million, eight hundred sixteen thousand, seven hundred thirty-nine".