1208246738891 has 2 divisors, whose sum is σ = 1208246738892. Its totient is φ = 1208246738890.

The previous prime is 1208246738863. The next prime is 1208246738917. The reversal of 1208246738891 is 1988376428021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1208246738891 - 2³⁸ = 933368831947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1208246738891.

It is not a weakly prime, because it can be changed into another prime (1208246738801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604123369445 + 604123369446.

It is an arithmetic number, because the mean of its divisors is an integer number (604123369446).

Almost surely, 2^{1208246738891} is an apocalyptic number.

1208246738891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1208246738891 is an equidigital number, since it uses as much as digits as its factorization.

1208246738891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 1208246738891 in words is "one trillion, two hundred eight billion, two hundred forty-six million, seven hundred thirty-eight thousand, eight hundred ninety-one".