272166509 has 2 divisors, whose sum is σ = 272166510. Its totient is φ = 272166508.

The previous prime is 272166497. The next prime is 272166511. The reversal of 272166509 is 905661272.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163277284 + 108889225 = 12778^2 + 10435^2 .

It is a cyclic number.

It is not a de Polignac number, because 272166509 - 2²⁴ = 255389293 is a prime.

Together with 272166511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272166599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136083254 + 136083255.

It is an arithmetic number, because the mean of its divisors is an integer number (136083255).

Almost surely, 2^272166509 is an apocalyptic number.

It is an amenable number.

272166509 is a deficient number, since it is larger than the sum of its proper divisors (1).

272166509 is an equidigital number, since it uses as much as digits as its factorization.

272166509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 272166509 is about 16497.4697756959. The cubic root of 272166509 is about 648.0545451787.

The spelling of 272166509 in words is "two hundred seventy-two million, one hundred sixty-six thousand, five hundred nine".