1386787 has 2 divisors, whose sum is σ = 1386788. Its totient is φ = 1386786.

The previous prime is 1386779. The next prime is 1386811. The reversal of 1386787 is 7876831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1386787 - 2³ = 1386779 is a prime.

It is a Chen prime.

1386787 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1386757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693393 + 693394.

It is an arithmetic number, because the mean of its divisors is an integer number (693394).

2^1386787 is an apocalyptic number.

1386787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1386787 is an equidigital number, since it uses as much as digits as its factorization.

1386787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 1386787 is about 1177.6192084031. The cubic root of 1386787 is about 111.5158469838.

The spelling of 1386787 in words is "one million, three hundred eighty-six thousand, seven hundred eighty-seven".