1987127 has 2 divisors, whose sum is σ = 1987128. Its totient is φ = 1987126.

The previous prime is 1987123. The next prime is 1987151. The reversal of 1987127 is 7217891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1987127 - 2² = 1987123 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1987121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993563 + 993564.

It is an arithmetic number, because the mean of its divisors is an integer number (993564).

2^1987127 is an apocalyptic number.

1987127 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987127 is an equidigital number, since it uses as much as digits as its factorization.

1987127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 35.

The square root of 1987127 is about 1409.6549223125. The cubic root of 1987127 is about 125.7212068823.

The spelling of 1987127 in words is "one million, nine hundred eighty-seven thousand, one hundred twenty-seven".