1139420309 has 2 divisors, whose sum is σ = 1139420310. Its totient is φ = 1139420308.

The previous prime is 1139420287. The next prime is 1139420327. The reversal of 1139420309 is 9030249311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 967023409 + 172396900 = 31097^2 + 13130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139420309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1139420339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569710154 + 569710155.

It is an arithmetic number, because the mean of its divisors is an integer number (569710155).

Almost surely, 2^1139420309 is an apocalyptic number.

It is an amenable number.

1139420309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139420309 is an equidigital number, since it uses as much as digits as its factorization.

1139420309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 1139420309 is about 33755.3004578540. The cubic root of 1139420309 is about 1044.4668293498.

The spelling of 1139420309 in words is "one billion, one hundred thirty-nine million, four hundred twenty thousand, three hundred nine".