75055709 has 2 divisors, whose sum is σ = 75055710. Its totient is φ = 75055708.

The previous prime is 75055661. The next prime is 75055711. The reversal of 75055709 is 90755057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54715609 + 20340100 = 7397^2 + 4510^2 .

It is a cyclic number.

It is not a de Polignac number, because 75055709 - 2¹⁶ = 74990173 is a prime.

Together with 75055711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75051709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37527854 + 37527855.

It is an arithmetic number, because the mean of its divisors is an integer number (37527855).

Almost surely, 2^75055709 is an apocalyptic number.

It is an amenable number.

75055709 is a deficient number, since it is larger than the sum of its proper divisors (1).

75055709 is an equidigital number, since it uses as much as digits as its factorization.

75055709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55125, while the sum is 38.

The square root of 75055709 is about 8663.4698014133. The cubic root of 75055709 is about 421.8207218985.

The spelling of 75055709 in words is "seventy-five million, fifty-five thousand, seven hundred nine".