71739313909 has 4 divisors (see below), whose sum is σ = 71743341600. Its totient is φ = 71735286220.

The previous prime is 71739313903. The next prime is 71739313939. The reversal of 71739313909 is 90931393717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71739313909 - 2³ = 71739313901 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 (71739313901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1987009 + ... + 2022790.

It is an arithmetic number, because the mean of its divisors is an integer number (17935835400).

Almost surely, 2^71739313909 is an apocalyptic number.

It is an amenable number.

71739313909 is a deficient number, since it is larger than the sum of its proper divisors (4027691).

71739313909 is a wasteful number, since it uses less digits than its factorization.

71739313909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027690.

The product of its (nonzero) digits is 964467, while the sum is 52.

The spelling of 71739313909 in words is "seventy-one billion, seven hundred thirty-nine million, three hundred thirteen thousand, nine hundred nine".