75227609 has 2 divisors, whose sum is σ = 75227610. Its totient is φ = 75227608.

The previous prime is 75227531. The next prime is 75227611. The reversal of 75227609 is 90672257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75203584 + 24025 = 8672^2 + 155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75227609 is a prime.

Together with 75227611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75227699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37613804 + 37613805.

It is an arithmetic number, because the mean of its divisors is an integer number (37613805).

Almost surely, 2^75227609 is an apocalyptic number.

It is an amenable number.

75227609 is a deficient number, since it is larger than the sum of its proper divisors (1).

75227609 is an equidigital number, since it uses as much as digits as its factorization.

75227609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 75227609 is about 8673.3850946444. The cubic root of 75227609 is about 422.1425081917.

The spelling of 75227609 in words is "seventy-five million, two hundred twenty-seven thousand, six hundred nine".