71719047 has 8 divisors (see below), whose sum is σ = 106250480. Its totient is φ = 47812680.

The previous prime is 71719033. The next prime is 71719049. The reversal of 71719047 is 74091717.

It is a de Polignac number, because none of the positive numbers 2^k-71719047 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 (71719049) 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 7 ways as a sum of consecutive naturals, for example, 1328104 + ... + 1328157.

It is an arithmetic number, because the mean of its divisors is an integer number (13281310).

Almost surely, 2^71719047 is an apocalyptic number.

71719047 is a deficient number, since it is larger than the sum of its proper divisors (34531433).

71719047 is a wasteful number, since it uses less digits than its factorization.

71719047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656270 (or 2656264 counting only the distinct ones).

The product of its (nonzero) digits is 12348, while the sum is 36.

The square root of 71719047 is about 8468.7098781337. The cubic root of 71719047 is about 415.4749427734.

The spelling of 71719047 in words is "seventy-one million, seven hundred nineteen thousand, forty-seven".