275399947 has 2 divisors, whose sum is σ = 275399948. Its totient is φ = 275399946.

The previous prime is 275399923. The next prime is 275399963. The reversal of 275399947 is 749993572.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-275399947 is a prime.

It is not a weakly prime, because it can be changed into another prime (275399977) 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 as a sum of consecutive naturals, namely, 137699973 + 137699974.

It is an arithmetic number, because the mean of its divisors is an integer number (137699974).

Almost surely, 2^275399947 is an apocalyptic number.

275399947 is a deficient number, since it is larger than the sum of its proper divisors (1).

275399947 is an equidigital number, since it uses as much as digits as its factorization.

275399947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4286520, while the sum is 55.

The square root of 275399947 is about 16595.1784262779. The cubic root of 275399947 is about 650.6108238389.

The spelling of 275399947 in words is "two hundred seventy-five million, three hundred ninety-nine thousand, nine hundred forty-seven".