1177987 has 2 divisors, whose sum is σ = 1177988. Its totient is φ = 1177986.

The previous prime is 1177949. The next prime is 1177997. The reversal of 1177987 is 7897711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1177987 - 2⁷ = 1177859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1177997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 588993 + 588994.

It is an arithmetic number, because the mean of its divisors is an integer number (588994).

2^1177987 is an apocalyptic number.

1177987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1177987 is an equidigital number, since it uses as much as digits as its factorization.

1177987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 40.

The square root of 1177987 is about 1085.3510952683. The cubic root of 1177987 is about 105.6120564651.

The spelling of 1177987 in words is "one million, one hundred seventy-seven thousand, nine hundred eighty-seven".