75770729 has 2 divisors, whose sum is σ = 75770730. Its totient is φ = 75770728.

The previous prime is 75770701. The next prime is 75770741. The reversal of 75770729 is 92707757.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74425129 + 1345600 = 8627^2 + 1160^2 .

It is an emirp because it is prime and its reverse (92707757) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75770729 - 2⁸ = 75770473 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75770729.

It is not a weakly prime, because it can be changed into another prime (75770749) 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, 37885364 + 37885365.

It is an arithmetic number, because the mean of its divisors is an integer number (37885365).

Almost surely, 2^75770729 is an apocalyptic number.

It is an amenable number.

75770729 is a deficient number, since it is larger than the sum of its proper divisors (1).

75770729 is an equidigital number, since it uses as much as digits as its factorization.

75770729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216090, while the sum is 44.

The square root of 75770729 is about 8704.6383612417. The cubic root of 75770729 is about 423.1559857438.

The spelling of 75770729 in words is "seventy-five million, seven hundred seventy thousand, seven hundred twenty-nine".