71960729 has 2 divisors, whose sum is σ = 71960730. Its totient is φ = 71960728.

The previous prime is 71960723. The next prime is 71960741. The reversal of 71960729 is 92706917.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 33085504 = 6235^2 + 5752^2 .

It is an emirp because it is prime and its reverse (92706917) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71960729 is a prime.

It is a super-2 number, since 2×71960729² = 10356693036422882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71960723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35980364 + 35980365.

It is an arithmetic number, because the mean of its divisors is an integer number (35980365).

Almost surely, 2^71960729 is an apocalyptic number.

It is an amenable number.

71960729 is a deficient number, since it is larger than the sum of its proper divisors (1).

71960729 is an equidigital number, since it uses as much as digits as its factorization.

71960729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 71960729 is about 8482.9669927449. The cubic root of 71960729 is about 415.9411147698.

The spelling of 71960729 in words is "seventy-one million, nine hundred sixty thousand, seven hundred twenty-nine".