71730739 has 2 divisors, whose sum is σ = 71730740. Its totient is φ = 71730738.

The previous prime is 71730731. The next prime is 71730773. The reversal of 71730739 is 93703717.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71730739 - 2³ = 71730731 is a prime.

It is a super-2 number, since 2×71730739² = 10290597834972242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71730698 and 71730707.

It is not a weakly prime, because it can be changed into another prime (71730731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35865369 + 35865370.

It is an arithmetic number, because the mean of its divisors is an integer number (35865370).

Almost surely, 2^71730739 is an apocalyptic number.

71730739 is a deficient number, since it is larger than the sum of its proper divisors (1).

71730739 is an equidigital number, since it uses as much as digits as its factorization.

71730739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27783, while the sum is 37.

The square root of 71730739 is about 8469.4001558552. The cubic root of 71730739 is about 415.4975191520.

The spelling of 71730739 in words is "seventy-one million, seven hundred thirty thousand, seven hundred thirty-nine".