75665243 has 2 divisors, whose sum is σ = 75665244. Its totient is φ = 75665242.

The previous prime is 75665231. The next prime is 75665257. The reversal of 75665243 is 34256657.

It is a weak prime.

It is an emirp because it is prime and its reverse (34256657) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75665243 - 2¹⁸ = 75403099 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75665197 and 75665206.

It is not a weakly prime, because it can be changed into another prime (75665273) 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, 37832621 + 37832622.

It is an arithmetic number, because the mean of its divisors is an integer number (37832622).

Almost surely, 2^75665243 is an apocalyptic number.

75665243 is a deficient number, since it is larger than the sum of its proper divisors (1).

75665243 is an equidigital number, since it uses as much as digits as its factorization.

75665243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 38.

The square root of 75665243 is about 8698.5770675439. The cubic root of 75665243 is about 422.9595256987.

The spelling of 75665243 in words is "seventy-five million, six hundred sixty-five thousand, two hundred forty-three".