71791129 has 4 divisors (see below), whose sum is σ = 72221184. Its totient is φ = 71361076.

The previous prime is 71791121. The next prime is 71791147. The reversal of 71791129 is 92119717.

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 71791129 - 2³ = 71791121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71791121) 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, 214777 + ... + 215110.

It is an arithmetic number, because the mean of its divisors is an integer number (18055296).

Almost surely, 2^71791129 is an apocalyptic number.

It is an amenable number.

71791129 is a deficient number, since it is larger than the sum of its proper divisors (430055).

71791129 is a wasteful number, since it uses less digits than its factorization.

71791129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430054.

The product of its digits is 7938, while the sum is 37.

The square root of 71791129 is about 8472.9645933404. The cubic root of 71791129 is about 415.6140886879.

The spelling of 71791129 in words is "seventy-one million, seven hundred ninety-one thousand, one hundred twenty-nine".