1087817 has 2 divisors, whose sum is σ = 1087818. Its totient is φ = 1087816.

The previous prime is 1087811. The next prime is 1087829. The reversal of 1087817 is 7187801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 546121 + 541696 = 739^2 + 736^2 .

It is an emirp because it is prime and its reverse (7187801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1087817 - 2⁶ = 1087753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1087811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543908 + 543909.

It is an arithmetic number, because the mean of its divisors is an integer number (543909).

2^1087817 is an apocalyptic number.

It is an amenable number.

1087817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087817 is an equidigital number, since it uses as much as digits as its factorization.

1087817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 1087817 is about 1042.9846595229. The cubic root of 1087817 is about 102.8454968259.

Adding to 1087817 its sum of digits (32), we get a square (1087849 = 1043²).

The spelling of 1087817 in words is "one million, eighty-seven thousand, eight hundred seventeen".