1204806139 has 2 divisors, whose sum is σ = 1204806140. Its totient is φ = 1204806138.

The previous prime is 1204806107. The next prime is 1204806151. The reversal of 1204806139 is 9316084021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1204806139 - 2⁵ = 1204806107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1204807139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602403069 + 602403070.

It is an arithmetic number, because the mean of its divisors is an integer number (602403070).

Almost surely, 2^1204806139 is an apocalyptic number.

1204806139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204806139 is an equidigital number, since it uses as much as digits as its factorization.

1204806139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1204806139 is about 34710.3174718988. The cubic root of 1204806139 is about 1064.0753695997.

The spelling of 1204806139 in words is "one billion, two hundred four million, eight hundred six thousand, one hundred thirty-nine".