71996311 has 4 divisors (see below), whose sum is σ = 72015552. Its totient is φ = 71977072.

The previous prime is 71996297. The next prime is 71996317. The reversal of 71996311 is 11369917.

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 71996311 - 2¹⁵ = 71963543 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 (71996317) 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 3 ways as a sum of consecutive naturals, for example, 1990 + ... + 12163.

It is an arithmetic number, because the mean of its divisors is an integer number (18003888).

Almost surely, 2^71996311 is an apocalyptic number.

71996311 is a deficient number, since it is larger than the sum of its proper divisors (19241).

71996311 is a wasteful number, since it uses less digits than its factorization.

71996311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19240.

The product of its digits is 10206, while the sum is 37.

The square root of 71996311 is about 8485.0639950445. The cubic root of 71996311 is about 416.0096594620.

The spelling of 71996311 in words is "seventy-one million, nine hundred ninety-six thousand, three hundred eleven".