275439921 has 4 divisors (see below), whose sum is σ = 367253232. Its totient is φ = 183626612.

The previous prime is 275439919. The next prime is 275439937. The reversal of 275439921 is 129934572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 275439921 - 2¹ = 275439919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (275439911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45906651 + ... + 45906656.

It is an arithmetic number, because the mean of its divisors is an integer number (91813308).

Almost surely, 2^275439921 is an apocalyptic number.

It is an amenable number.

275439921 is a deficient number, since it is larger than the sum of its proper divisors (91813311).

275439921 is an equidigital number, since it uses as much as digits as its factorization.

275439921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91813310.

The product of its digits is 136080, while the sum is 42.

The square root of 275439921 is about 16596.3827685433. The cubic root of 275439921 is about 650.6423007983.

The spelling of 275439921 in words is "two hundred seventy-five million, four hundred thirty-nine thousand, nine hundred twenty-one".