275120987 has 4 divisors (see below), whose sum is σ = 277555800. Its totient is φ = 272686176.

The previous prime is 275120981. The next prime is 275121023. The reversal of 275120987 is 789021572.

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

It is a de Polignac number, because none of the positive numbers 2^k-275120987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275120981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1217237 + ... + 1217462.

It is an arithmetic number, because the mean of its divisors is an integer number (69388950).

Almost surely, 2^275120987 is an apocalyptic number.

275120987 is a deficient number, since it is larger than the sum of its proper divisors (2434813).

275120987 is a wasteful number, since it uses less digits than its factorization.

275120987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434812.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 275120987 is about 16586.7714459445. The cubic root of 275120987 is about 650.3910759026.

The spelling of 275120987 in words is "two hundred seventy-five million, one hundred twenty thousand, nine hundred eighty-seven".