71891794 has 16 divisors (see below), whose sum is σ = 118039320. Its totient is φ = 32636160.

The previous prime is 71891789. The next prime is 71891803. The reversal of 71891794 is 49719817.

It can be written as a sum of positive squares in 4 ways, for example, as 31505769 + 40386025 = 5613^2 + 6355^2 .

It is an unprimeable number.

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, 21079 + ... + 24250.

Almost surely, 2^71891794 is an apocalyptic number.

71891794 is a deficient number, since it is larger than the sum of its proper divisors (46147526).

71891794 is a wasteful number, since it uses less digits than its factorization.

71891794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45405.

The product of its digits is 127008, while the sum is 46.

The square root of 71891794 is about 8478.9028771416. The cubic root of 71891794 is about 415.8082549828.

The spelling of 71891794 in words is "seventy-one million, eight hundred ninety-one thousand, seven hundred ninety-four".