275684987 has 2 divisors, whose sum is σ = 275684988. Its totient is φ = 275684986.

The previous prime is 275684951. The next prime is 275684989. The reversal of 275684987 is 789486572.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 275684987 - 2¹⁸ = 275422843 is a prime.

Together with 275684989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (275684989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137842493 + 137842494.

It is an arithmetic number, because the mean of its divisors is an integer number (137842494).

Almost surely, 2^275684987 is an apocalyptic number.

275684987 is a deficient number, since it is larger than the sum of its proper divisors (1).

275684987 is an equidigital number, since it uses as much as digits as its factorization.

275684987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 56.

The square root of 275684987 is about 16603.7642418820. The cubic root of 275684987 is about 650.8352080088.

The spelling of 275684987 in words is "two hundred seventy-five million, six hundred eighty-four thousand, nine hundred eighty-seven".