1247202370789 has 2 divisors, whose sum is σ = 1247202370790. Its totient is φ = 1247202370788.

The previous prime is 1247202370753. The next prime is 1247202370801. The reversal of 1247202370789 is 9870732027421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1053969156900 + 193233213889 = 1026630^2 + 439583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247202370789 - 2⁹ = 1247202370277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247209370789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623601185394 + 623601185395.

It is an arithmetic number, because the mean of its divisors is an integer number (623601185395).

Almost surely, 2^{1247202370789} is an apocalyptic number.

It is an amenable number.

1247202370789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247202370789 is an equidigital number, since it uses as much as digits as its factorization.

1247202370789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 52.

The spelling of 1247202370789 in words is "one trillion, two hundred forty-seven billion, two hundred two million, three hundred seventy thousand, seven hundred eighty-nine".