275857649 has 4 divisors (see below), whose sum is σ = 279743040. Its totient is φ = 271972260.

The previous prime is 275857643. The next prime is 275857697. The reversal of 275857649 is 946758572.

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 275857649 - 2¹⁶ = 275792113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 275857649.

It is not an unprimeable number, because it can be changed into a prime (275857643) 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 3 ways as a sum of consecutive naturals, for example, 1942589 + ... + 1942730.

It is an arithmetic number, because the mean of its divisors is an integer number (69935760).

Almost surely, 2^275857649 is an apocalyptic number.

It is an amenable number.

275857649 is a deficient number, since it is larger than the sum of its proper divisors (3885391).

275857649 is an equidigital number, since it uses as much as digits as its factorization.

275857649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885390.

The product of its digits is 4233600, while the sum is 53.

The square root of 275857649 is about 16608.9629116330. The cubic root of 275857649 is about 650.9710527374.

The spelling of 275857649 in words is "two hundred seventy-five million, eight hundred fifty-seven thousand, six hundred forty-nine".