1187084987 has 4 divisors (see below), whose sum is σ = 1295001816. Its totient is φ = 1079168160.

The previous prime is 1187084971. The next prime is 1187084989. The reversal of 1187084987 is 7894807811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7894807811 = 11 ⋅717709801.

It is a cyclic number.

It is not a de Polignac number, because 1187084987 - 2⁴ = 1187084971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187084989) 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 in 3 ways as a sum of consecutive naturals, for example, 53958398 + ... + 53958419.

It is an arithmetic number, because the mean of its divisors is an integer number (323750454).

Almost surely, 2^1187084987 is an apocalyptic number.

1187084987 is a deficient number, since it is larger than the sum of its proper divisors (107916829).

1187084987 is a wasteful number, since it uses less digits than its factorization.

1187084987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107916828.

The product of its (nonzero) digits is 903168, while the sum is 53.

The square root of 1187084987 is about 34454.0997125161. The cubic root of 1187084987 is about 1058.8325187527.

The spelling of 1187084987 in words is "one billion, one hundred eighty-seven million, eighty-four thousand, nine hundred eighty-seven".