275749129 has 4 divisors (see below), whose sum is σ = 291969684. Its totient is φ = 259528576.

The previous prime is 275749099. The next prime is 275749169. The reversal of 275749129 is 921947572.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 216766729 + 58982400 = 14723^2 + 7680^2 .

It is a cyclic number.

It is not a de Polignac number, because 275749129 - 2¹³ = 275740937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275749169) 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 3 ways as a sum of consecutive naturals, for example, 8110252 + ... + 8110285.

It is an arithmetic number, because the mean of its divisors is an integer number (72992421).

Almost surely, 2^275749129 is an apocalyptic number.

It is an amenable number.

275749129 is a deficient number, since it is larger than the sum of its proper divisors (16220555).

275749129 is a wasteful number, since it uses less digits than its factorization.

275749129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16220554.

The product of its digits is 317520, while the sum is 46.

The square root of 275749129 is about 16605.6956794950. The cubic root of 275749129 is about 650.8856794245.

The spelling of 275749129 in words is "two hundred seventy-five million, seven hundred forty-nine thousand, one hundred twenty-nine".