71997335169 has 4 divisors (see below), whose sum is σ = 95996446896. Its totient is φ = 47998223444.

The previous prime is 71997335147. The next prime is 71997335197. The reversal of 71997335169 is 96153379917.

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 a de Polignac number, because none of the positive numbers 2^k-71997335169 is a prime.

It is a super-2 number, since 2×71997335169² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71997335119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11999555859 + ... + 11999555864.

It is an arithmetic number, because the mean of its divisors is an integer number (23999111724).

Almost surely, 2^71997335169 is an apocalyptic number.

It is an amenable number.

71997335169 is a deficient number, since it is larger than the sum of its proper divisors (23999111727).

71997335169 is a wasteful number, since it uses less digits than its factorization.

71997335169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23999111726.

The product of its digits is 9644670, while the sum is 60.

The spelling of 71997335169 in words is "seventy-one billion, nine hundred ninety-seven million, three hundred thirty-five thousand, one hundred sixty-nine".