275528009 has 2 divisors, whose sum is σ = 275528010. Its totient is φ = 275528008.

The previous prime is 275528003. The next prime is 275528051. The reversal of 275528009 is 900825572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275460409 + 67600 = 16597^2 + 260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-275528009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (275528003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137764004 + 137764005.

It is an arithmetic number, because the mean of its divisors is an integer number (137764005).

Almost surely, 2^275528009 is an apocalyptic number.

It is an amenable number.

275528009 is a deficient number, since it is larger than the sum of its proper divisors (1).

275528009 is an equidigital number, since it uses as much as digits as its factorization.

275528009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 275528009 is about 16599.0363876943. The cubic root of 275528009 is about 650.7116536964.

The spelling of 275528009 in words is "two hundred seventy-five million, five hundred twenty-eight thousand, nine".