71330123929 has 9 divisors (see below), whose sum is σ = 71614621533. Its totient is φ = 71046755232.

The previous prime is 71330123857. The next prime is 71330123933. The reversal of 71330123929 is 92932103317.

The square root of 71330123929 is 267077.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2972975625 + 68357148304 = 54525^2 + 261452^2 .

It is not a de Polignac number, because 71330123929 - 2²³ = 71321735321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71330123891 and 71330123900.

It is not an unprimeable number, because it can be changed into a prime (71330123959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 109234167 + ... + 109234819.

Almost surely, 2^71330123929 is an apocalyptic number.

71330123929 is the 267077-th square number.

71330123929 is the 133539-th centered octagonal number.

It is an amenable number.

71330123929 is a deficient number, since it is larger than the sum of its proper divisors (284497604).

71330123929 is an frugal number, since it uses more digits than its factorization.

71330123929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124 (or 1062 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 40.

The spelling of 71330123929 in words is "seventy-one billion, three hundred thirty million, one hundred twenty-three thousand, nine hundred twenty-nine".