272388921 has 16 divisors (see below), whose sum is σ = 436915200. Its totient is φ = 147458448.

The previous prime is 272388913. The next prime is 272388947. The reversal of 272388921 is 129883272.

It is a happy number.

It is not a de Polignac number, because 272388921 - 2³ = 272388913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (272388911) 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 15 ways as a sum of consecutive naturals, for example, 340941 + ... + 341738.

It is an arithmetic number, because the mean of its divisors is an integer number (27307200).

Almost surely, 2^272388921 is an apocalyptic number.

272388921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

272388921 is a deficient number, since it is larger than the sum of its proper divisors (164526279).

272388921 is a wasteful number, since it uses less digits than its factorization.

272388921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682708.

The product of its digits is 96768, while the sum is 42.

The square root of 272388921 is about 16504.2091903853. The cubic root of 272388921 is about 648.2310252115.

The spelling of 272388921 in words is "two hundred seventy-two million, three hundred eighty-eight thousand, nine hundred twenty-one".