1087309 has 2 divisors, whose sum is σ = 1087310. Its totient is φ = 1087308.

The previous prime is 1087301. The next prime is 1087349. The reversal of 1087309 is 9037801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010025 + 77284 = 1005^2 + 278^2 .

It is an emirp because it is prime and its reverse (9037801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1087309 - 2³ = 1087301 is a prime.

It is a super-2 number, since 2×1087309² = 2364481722962, which contains 22 as substring.

1087309 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1087301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543654 + 543655.

It is an arithmetic number, because the mean of its divisors is an integer number (543655).

2^1087309 is an apocalyptic number.

It is an amenable number.

1087309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1087309 is an equidigital number, since it uses as much as digits as its factorization.

1087309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1087309 is about 1042.7410992188. The cubic root of 1087309 is about 102.8294850496.

The spelling of 1087309 in words is "one million, eighty-seven thousand, three hundred nine".