71144774 has 4 divisors (see below), whose sum is σ = 106717164. Its totient is φ = 35572386.

The previous prime is 71144771. The next prime is 71144789. The reversal of 71144774 is 47744117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47744117 = 73 ⋅654029.

It is a super-3 number, since 3×71144774³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71144771) 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 as a sum of consecutive naturals, namely, 17786192 + ... + 17786195.

It is an arithmetic number, because the mean of its divisors is an integer number (26679291).

Almost surely, 2^71144774 is an apocalyptic number.

71144774 is a deficient number, since it is larger than the sum of its proper divisors (35572390).

71144774 is a wasteful number, since it uses less digits than its factorization.

71144774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35572389.

The product of its digits is 21952, while the sum is 35.

The square root of 71144774 is about 8434.7361547354. The cubic root of 71144774 is about 414.3630311617.

The spelling of 71144774 in words is "seventy-one million, one hundred forty-four thousand, seven hundred seventy-four".