275864921 has 4 divisors (see below), whose sum is σ = 287859072. Its totient is φ = 263870772.

The previous prime is 275864917. The next prime is 275864923. The reversal of 275864921 is 129468572.

It is a happy number.

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 275864921 - 2² = 275864917 is a prime.

It is a super-2 number, since 2×275864921² = 152202909276672482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275864923) 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, 5997041 + ... + 5997086.

It is an arithmetic number, because the mean of its divisors is an integer number (71964768).

Almost surely, 2^275864921 is an apocalyptic number.

It is an amenable number.

275864921 is a deficient number, since it is larger than the sum of its proper divisors (11994151).

275864921 is a wasteful number, since it uses less digits than its factorization.

275864921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11994150.

The product of its digits is 241920, while the sum is 44.

The square root of 275864921 is about 16609.1818281335. The cubic root of 275864921 is about 650.9767728615.

The spelling of 275864921 in words is "two hundred seventy-five million, eight hundred sixty-four thousand, nine hundred twenty-one".