71959161 has 4 divisors (see below), whose sum is σ = 95945552. Its totient is φ = 47972772.

The previous prime is 71959123. The next prime is 71959169. The reversal of 71959161 is 16195917.

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 not a de Polignac number, because 71959161 - 2¹⁰ = 71958137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71959169) 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, 11993191 + ... + 11993196.

It is an arithmetic number, because the mean of its divisors is an integer number (23986388).

Almost surely, 2^71959161 is an apocalyptic number.

It is an amenable number.

71959161 is a deficient number, since it is larger than the sum of its proper divisors (23986391).

71959161 is a wasteful number, since it uses less digits than its factorization.

71959161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23986390.

The product of its digits is 17010, while the sum is 39.

The square root of 71959161 is about 8482.8745717475. The cubic root of 71959161 is about 415.9380936757.

It can be divided in two parts, 7195916 and 1, that added together give a palindrome (7195917).

The spelling of 71959161 in words is "seventy-one million, nine hundred fifty-nine thousand, one hundred sixty-one".