272439809 has 2 divisors, whose sum is σ = 272439810. Its totient is φ = 272439808.

The previous prime is 272439799. The next prime is 272439829. The reversal of 272439809 is 908934272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271326784 + 1113025 = 16472^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 272439809 - 2⁸ = 272439553 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 272439809.

It is not a weakly prime, because it can be changed into another prime (272439829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136219904 + 136219905.

It is an arithmetic number, because the mean of its divisors is an integer number (136219905).

Almost surely, 2^272439809 is an apocalyptic number.

It is an amenable number.

272439809 is a deficient number, since it is larger than the sum of its proper divisors (1).

272439809 is an equidigital number, since it uses as much as digits as its factorization.

272439809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 272439809 is about 16505.7507857110. The cubic root of 272439809 is about 648.2713904440.

The spelling of 272439809 in words is "two hundred seventy-two million, four hundred thirty-nine thousand, eight hundred nine".