71319939 has 8 divisors (see below), whose sum is σ = 100098240. Its totient is φ = 45044136.

The previous prime is 71319931. The next prime is 71319943. The reversal of 71319939 is 93991317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71319939 - 2³ = 71319931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71319939.

It is not an unprimeable number, because it can be changed into a prime (71319931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625557 + ... + 625670.

It is an arithmetic number, because the mean of its divisors is an integer number (12512280).

Almost surely, 2^71319939 is an apocalyptic number.

71319939 is a deficient number, since it is larger than the sum of its proper divisors (28778301).

71319939 is a wasteful number, since it uses less digits than its factorization.

71319939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251249.

The product of its digits is 45927, while the sum is 42.

The square root of 71319939 is about 8445.1133207317. The cubic root of 71319939 is about 414.7028191266.

The spelling of 71319939 in words is "seventy-one million, three hundred nineteen thousand, nine hundred thirty-nine".