1068309 has 30 divisors (see below), whose sum is σ = 1770230. Its totient is φ = 641520.

The previous prime is 1068307. The next prime is 1068311. The reversal of 1068309 is 9038601.

It is an interprime number because it is at equal distance from previous prime (1068307) and next prime (1068311).

It can be written as a sum of positive squares in only one way, i.e., 980100 + 88209 = 990^2 + 297^2 .

It is not a de Polignac number, because 1068309 - 2¹ = 1068307 is a prime.

It is a super-2 number, since 2×1068309² = 2282568238962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068307) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 9747 + ... + 9855.

2^1068309 is an apocalyptic number.

1068309 is the 654-th heptagonal number.

It is an amenable number.

1068309 is a deficient number, since it is larger than the sum of its proper divisors (701921).

1068309 is a wasteful number, since it uses less digits than its factorization.

1068309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1068309 is about 1033.5903443821. The cubic root of 1068309 is about 102.2270030758.

The spelling of 1068309 in words is "one million, sixty-eight thousand, three hundred nine".