1001687 has 2 divisors, whose sum is σ = 1001688. Its totient is φ = 1001686.

The previous prime is 1001683. The next prime is 1001713. The reversal of 1001687 is 7861001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001687 - 2² = 1001683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500843 + 500844.

It is an arithmetic number, because the mean of its divisors is an integer number (500844).

2^1001687 is an apocalyptic number.

1001687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001687 is an equidigital number, since it uses as much as digits as its factorization.

1001687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 1001687 is about 1000.8431445536. The cubic root of 1001687 is about 100.0562017411.

Adding to 1001687 its reverse (7861001), we get a palindrome (8862688).

The spelling of 1001687 in words is "one million, one thousand, six hundred eighty-seven".