273864021 has 8 divisors (see below), whose sum is σ = 365235744. Its totient is φ = 182534160.

The previous prime is 273864001. The next prime is 273864029. The reversal of 273864021 is 120468372.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 273864021 - 2⁶ = 273863957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273864029) 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 in 7 ways as a sum of consecutive naturals, for example, 11226 + ... + 25956.

It is an arithmetic number, because the mean of its divisors is an integer number (45654468).

Almost surely, 2^273864021 is an apocalyptic number.

It is an amenable number.

273864021 is a deficient number, since it is larger than the sum of its proper divisors (91371723).

273864021 is a wasteful number, since it uses less digits than its factorization.

273864021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20931.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 273864021 is about 16548.8374516157. The cubic root of 273864021 is about 649.3990666914.

The spelling of 273864021 in words is "two hundred seventy-three million, eight hundred sixty-four thousand, twenty-one".