275987 has 2 divisors, whose sum is σ = 275988. Its totient is φ = 275986.

The previous prime is 275981. The next prime is 275999. The reversal of 275987 is 789572.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 275987 - 2⁶ = 275923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 275987.

It is not a weakly prime, because it can be changed into another prime (275981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137993 + 137994.

It is an arithmetic number, because the mean of its divisors is an integer number (137994).

2²⁷⁵⁹⁸⁷ is an apocalyptic number.

275987 is a deficient number, since it is larger than the sum of its proper divisors (1).

275987 is an equidigital number, since it uses as much as digits as its factorization.

275987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 275987 is about 525.3446487783. The cubic root of 275987 is about 65.1072784674.

The spelling of 275987 in words is "two hundred seventy-five thousand, nine hundred eighty-seven".