1387340287 has 2 divisors, whose sum is σ = 1387340288. Its totient is φ = 1387340286.

The previous prime is 1387340281. The next prime is 1387340299. The reversal of 1387340287 is 7820437831.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387340287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387340281) 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 as a sum of consecutive naturals, namely, 693670143 + 693670144.

It is an arithmetic number, because the mean of its divisors is an integer number (693670144).

Almost surely, 2^1387340287 is an apocalyptic number.

1387340287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387340287 is an equidigital number, since it uses as much as digits as its factorization.

1387340287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 1387340287 is about 37247.0171557401. The cubic root of 1387340287 is about 1115.3067552027.

The spelling of 1387340287 in words is "one billion, three hundred eighty-seven million, three hundred forty thousand, two hundred eighty-seven".