71791889 has 8 divisors (see below), whose sum is σ = 78960000. Its totient is φ = 64858896.

The previous prime is 71791859. The next prime is 71791891. The reversal of 71791889 is 98819717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71791889 - 2¹⁶ = 71726353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71791829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58139 + ... + 59360.

It is an arithmetic number, because the mean of its divisors is an integer number (9870000).

Almost surely, 2^71791889 is an apocalyptic number.

It is an amenable number.

71791889 is a deficient number, since it is larger than the sum of its proper divisors (7168111).

71791889 is a wasteful number, since it uses less digits than its factorization.

71791889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117559.

The product of its digits is 254016, while the sum is 50.

The square root of 71791889 is about 8473.0094417509. The cubic root of 71791889 is about 415.6155552831.

The spelling of 71791889 in words is "seventy-one million, seven hundred ninety-one thousand, eight hundred eighty-nine".