75147217 has 2 divisors, whose sum is σ = 75147218. Its totient is φ = 75147216.

The previous prime is 75147211. The next prime is 75147227. The reversal of 75147217 is 71274157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47279376 + 27867841 = 6876^2 + 5279^2 .

It is an emirp because it is prime and its reverse (71274157) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75147217 is a prime.

It is not a weakly prime, because it can be changed into another prime (75147211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37573608 + 37573609.

It is an arithmetic number, because the mean of its divisors is an integer number (37573609).

Almost surely, 2^75147217 is an apocalyptic number.

It is an amenable number.

75147217 is a deficient number, since it is larger than the sum of its proper divisors (1).

75147217 is an equidigital number, since it uses as much as digits as its factorization.

75147217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13720, while the sum is 34.

The square root of 75147217 is about 8668.7494484499. The cubic root of 75147217 is about 421.9920803677.

The spelling of 75147217 in words is "seventy-five million, one hundred forty-seven thousand, two hundred seventeen".