272505509 has 2 divisors, whose sum is σ = 272505510. Its totient is φ = 272505508.

The previous prime is 272505463. The next prime is 272505521. The reversal of 272505509 is 905505272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175483009 + 97022500 = 13247^2 + 9850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-272505509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272505539) 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, 136252754 + 136252755.

It is an arithmetic number, because the mean of its divisors is an integer number (136252755).

Almost surely, 2^272505509 is an apocalyptic number.

It is an amenable number.

272505509 is a deficient number, since it is larger than the sum of its proper divisors (1).

272505509 is an equidigital number, since it uses as much as digits as its factorization.

272505509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 272505509 is about 16507.7408811745. The cubic root of 272505509 is about 648.3234973752.

The spelling of 272505509 in words is "two hundred seventy-two million, five hundred five thousand, five hundred nine".