75742217 has 2 divisors, whose sum is σ = 75742218. Its totient is φ = 75742216.

The previous prime is 75742169. The next prime is 75742237. The reversal of 75742217 is 71224757.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75620416 + 121801 = 8696^2 + 349^2 .

It is a cyclic number.

It is not a de Polignac number, because 75742217 - 2²² = 71547913 is a prime.

It is not a weakly prime, because it can be changed into another prime (75742237) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37871108 + 37871109.

It is an arithmetic number, because the mean of its divisors is an integer number (37871109).

Almost surely, 2^75742217 is an apocalyptic number.

It is an amenable number.

75742217 is a deficient number, since it is larger than the sum of its proper divisors (1).

75742217 is an equidigital number, since it uses as much as digits as its factorization.

75742217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27440, while the sum is 35.

The square root of 75742217 is about 8703.0004596116. Note that the first 3 decimals coincide. The cubic root of 75742217 is about 423.1029021970.

The spelling of 75742217 in words is "seventy-five million, seven hundred forty-two thousand, two hundred seventeen".