71913189 has 4 divisors (see below), whose sum is σ = 95884256. Its totient is φ = 47942124.

The previous prime is 71913173. The next prime is 71913217. The reversal of 71913189 is 98131917.

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 71913189 - 2⁴ = 71913173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71913169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11985529 + ... + 11985534.

It is an arithmetic number, because the mean of its divisors is an integer number (23971064).

Almost surely, 2^71913189 is an apocalyptic number.

It is an amenable number.

71913189 is a deficient number, since it is larger than the sum of its proper divisors (23971067).

71913189 is a wasteful number, since it uses less digits than its factorization.

71913189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23971066.

The product of its digits is 13608, while the sum is 39.

The square root of 71913189 is about 8480.1644441603. The cubic root of 71913189 is about 415.8494990746.

The spelling of 71913189 in words is "seventy-one million, nine hundred thirteen thousand, one hundred eighty-nine".