75272009 has 2 divisors, whose sum is σ = 75272010. Its totient is φ = 75272008.

The previous prime is 75271997. The next prime is 75272063. The reversal of 75272009 is 90027257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75255625 + 16384 = 8675^2 + 128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75272009 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (75272609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37636004 + 37636005.

It is an arithmetic number, because the mean of its divisors is an integer number (37636005).

Almost surely, 2^75272009 is an apocalyptic number.

It is an amenable number.

75272009 is a deficient number, since it is larger than the sum of its proper divisors (1).

75272009 is an equidigital number, since it uses as much as digits as its factorization.

75272009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 75272009 is about 8675.9442713747. The cubic root of 75272009 is about 422.2255426050.

The spelling of 75272009 in words is "seventy-five million, two hundred seventy-two thousand, nine".