1000387 has 4 divisors (see below), whose sum is σ = 1006096. Its totient is φ = 994680.

The previous prime is 1000381. The next prime is 1000393. The reversal of 1000387 is 7830001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7830001 = 131 ⋅59771.

It is an interprime number because it is at equal distance from previous prime (1000381) and next prime (1000393).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000381) 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 in 3 ways as a sum of consecutive naturals, for example, 2583 + ... + 2944.

It is an arithmetic number, because the mean of its divisors is an integer number (251524).

2^1000387 is an apocalyptic number.

1000387 is a deficient number, since it is larger than the sum of its proper divisors (5709).

1000387 is an equidigital number, since it uses as much as digits as its factorization.

1000387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1000387 is about 1000.1934812825. The cubic root of 1000387 is about 100.0128983363.

Adding to 1000387 its reverse (7830001), we get a palindrome (8830388).

The spelling of 1000387 in words is "one million, three hundred eighty-seven", and thus it is an aban number.