71989098917 has 4 divisors (see below), whose sum is σ = 75777998880. Its totient is φ = 68200198956.

The previous prime is 71989098911. The next prime is 71989098931.

71989098917 is nontrivially palindromic in base 10.

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 71989098917 - 2¹⁰ = 71989097893 is a prime.

It is a super-2 number, since 2×71989098917² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71989098911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894449953 + ... + 1894449990.

It is an arithmetic number, because the mean of its divisors is an integer number (18944499720).

Almost surely, 2^71989098917 is an apocalyptic number.

It is an amenable number.

71989098917 is a deficient number, since it is larger than the sum of its proper divisors (3788899963).

71989098917 is a wasteful number, since it uses less digits than its factorization.

71989098917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788899962.

The product of its (nonzero) digits is 20575296, while the sum is 68.

The spelling of 71989098917 in words is "seventy-one billion, nine hundred eighty-nine million, ninety-eight thousand, nine hundred seventeen".