1387039 has 2 divisors, whose sum is σ = 1387040. Its totient is φ = 1387038.

The previous prime is 1387037. The next prime is 1387069. The reversal of 1387039 is 9307831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1387039 - 2¹ = 1387037 is a prime.

Together with 1387037, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387037) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693519 + 693520.

It is an arithmetic number, because the mean of its divisors is an integer number (693520).

2^1387039 is an apocalyptic number.

1387039 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387039 is an equidigital number, since it uses as much as digits as its factorization.

1387039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 1387039 is about 1177.7261990802. The cubic root of 1387039 is about 111.5226012754.

The spelling of 1387039 in words is "one million, three hundred eighty-seven thousand, thirty-nine".