75394217209 has 2 divisors, whose sum is σ = 75394217210. Its totient is φ = 75394217208.

The previous prime is 75394217183. The next prime is 75394217267. The reversal of 75394217209 is 90271249357.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42559690000 + 32834527209 = 206300^2 + 181203^2 .

It is an emirp because it is prime and its reverse (90271249357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75394217209 - 2²⁵ = 75360662777 is a prime.

It is not a weakly prime, because it can be changed into another prime (75394215209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37697108604 + 37697108605.

It is an arithmetic number, because the mean of its divisors is an integer number (37697108605).

Almost surely, 2^75394217209 is an apocalyptic number.

It is an amenable number.

75394217209 is a deficient number, since it is larger than the sum of its proper divisors (1).

75394217209 is an equidigital number, since it uses as much as digits as its factorization.

75394217209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 75394217209 in words is "seventy-five billion, three hundred ninety-four million, two hundred seventeen thousand, two hundred nine".