1206728449739 has 2 divisors, whose sum is σ = 1206728449740. Its totient is φ = 1206728449738.

The previous prime is 1206728449699. The next prime is 1206728449763. The reversal of 1206728449739 is 9379448276021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1206728449739 is a prime.

It is not a weakly prime, because it can be changed into another prime (1206728449789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603364224869 + 603364224870.

It is an arithmetic number, because the mean of its divisors is an integer number (603364224870).

Almost surely, 2^{1206728449739} is an apocalyptic number.

1206728449739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206728449739 is an equidigital number, since it uses as much as digits as its factorization.

1206728449739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 1206728449739 in words is "one trillion, two hundred six billion, seven hundred twenty-eight million, four hundred forty-nine thousand, seven hundred thirty-nine".