1139309 has 2 divisors, whose sum is σ = 1139310. Its totient is φ = 1139308.

The previous prime is 1139293. The next prime is 1139321. The reversal of 1139309 is 9039311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 635209 + 504100 = 797^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1139309 - 2⁴ = 1139293 is a prime.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569654 + 569655.

It is an arithmetic number, because the mean of its divisors is an integer number (569655).

2^1139309 is an apocalyptic number.

It is an amenable number.

1139309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139309 is an equidigital number, since it uses as much as digits as its factorization.

1139309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 26.

The square root of 1139309 is about 1067.3841857551. The cubic root of 1139309 is about 104.4432817217.

The spelling of 1139309 in words is "one million, one hundred thirty-nine thousand, three hundred nine".