276427987 has 4 divisors (see below), whose sum is σ = 301557816. Its totient is φ = 251298160.

The previous prime is 276427969. The next prime is 276427993. The reversal of 276427987 is 789724672.

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

It is a cyclic number.

It is not a de Polignac number, because 276427987 - 2²³ = 268039379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (276427927) 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, 12564898 + ... + 12564919.

It is an arithmetic number, because the mean of its divisors is an integer number (75389454).

Almost surely, 2^276427987 is an apocalyptic number.

276427987 is a deficient number, since it is larger than the sum of its proper divisors (25129829).

276427987 is a wasteful number, since it uses less digits than its factorization.

276427987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25129828.

The product of its digits is 2370816, while the sum is 52.

The square root of 276427987 is about 16626.1236312016. The cubic root of 276427987 is about 651.4193732785.

The spelling of 276427987 in words is "two hundred seventy-six million, four hundred twenty-seven thousand, nine hundred eighty-seven".