273686409 has 12 divisors (see below), whose sum is σ = 397069296. Its totient is φ = 181652472.

The previous prime is 273686401. The next prime is 273686411. The reversal of 273686409 is 904686372.

It is not a de Polignac number, because 273686409 - 2³ = 273686401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (273686401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64939 + ... + 69024.

It is an arithmetic number, because the mean of its divisors is an integer number (33089108).

Almost surely, 2^273686409 is an apocalyptic number.

It is an amenable number.

273686409 is a deficient number, since it is larger than the sum of its proper divisors (123382887).

273686409 is a wasteful number, since it uses less digits than its factorization.

273686409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134196 (or 134193 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 273686409 is about 16543.4702828639. The cubic root of 273686409 is about 649.2586490612.

The spelling of 273686409 in words is "two hundred seventy-three million, six hundred eighty-six thousand, four hundred nine".