1204051309 has 2 divisors, whose sum is σ = 1204051310. Its totient is φ = 1204051308.

The previous prime is 1204051301. The next prime is 1204051339. The reversal of 1204051309 is 9031504021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 970634025 + 233417284 = 31155^2 + 15278^2 .

It is an emirp because it is prime and its reverse (9031504021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1204051309 - 2³ = 1204051301 is a prime.

It is a super-2 number, since 2×1204051309² = 2899479109409226962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1204051301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602025654 + 602025655.

It is an arithmetic number, because the mean of its divisors is an integer number (602025655).

Almost surely, 2^1204051309 is an apocalyptic number.

It is an amenable number.

1204051309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204051309 is an equidigital number, since it uses as much as digits as its factorization.

1204051309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1204051309 is about 34699.4424883167. The cubic root of 1204051309 is about 1063.8531031891.

The spelling of 1204051309 in words is "one billion, two hundred four million, fifty-one thousand, three hundred nine".