75987217 has 2 divisors, whose sum is σ = 75987218. Its totient is φ = 75987216.

The previous prime is 75987209. The next prime is 75987257. The reversal of 75987217 is 71278957.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74632321 + 1354896 = 8639^2 + 1164^2 .

It is an emirp because it is prime and its reverse (71278957) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75987217 - 2³ = 75987209 is a prime.

It is not a weakly prime, because it can be changed into another prime (75987257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37993608 + 37993609.

It is an arithmetic number, because the mean of its divisors is an integer number (37993609).

Almost surely, 2^75987217 is an apocalyptic number.

It is an amenable number.

75987217 is a deficient number, since it is larger than the sum of its proper divisors (1).

75987217 is an equidigital number, since it uses as much as digits as its factorization.

75987217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 46.

The square root of 75987217 is about 8717.0647009185. The cubic root of 75987217 is about 423.5586086146.

The spelling of 75987217 in words is "seventy-five million, nine hundred eighty-seven thousand, two hundred seventeen".