71276729 has 2 divisors, whose sum is σ = 71276730. Its totient is φ = 71276728.

The previous prime is 71276717. The next prime is 71276743. The reversal of 71276729 is 92767217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57229225 + 14047504 = 7565^2 + 3748^2 .

It is an emirp because it is prime and its reverse (92767217) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71276729 - 2⁴ = 71276713 is a prime.

It is not a weakly prime, because it can be changed into another prime (71276749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35638364 + 35638365.

It is an arithmetic number, because the mean of its divisors is an integer number (35638365).

Almost surely, 2^71276729 is an apocalyptic number.

It is an amenable number.

71276729 is a deficient number, since it is larger than the sum of its proper divisors (1).

71276729 is an equidigital number, since it uses as much as digits as its factorization.

71276729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 41.

The square root of 71276729 is about 8442.5546489200. The cubic root of 71276729 is about 414.6190513932.

The spelling of 71276729 in words is "seventy-one million, two hundred seventy-six thousand, seven hundred twenty-nine".