1247654247613 has 2 divisors, whose sum is σ = 1247654247614. Its totient is φ = 1247654247612.

The previous prime is 1247654247583. The next prime is 1247654247649. The reversal of 1247654247613 is 3167424567421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 802747905444 + 444906342169 = 895962^2 + 667013^2 .

It is a cyclic number.

It is not a de Polignac number, because 1247654247613 - 2⁹ = 1247654247101 is a prime.

It is a super-2 number, since 2×1247654247613² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1247654247683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623827123806 + 623827123807.

It is an arithmetic number, because the mean of its divisors is an integer number (623827123807).

Almost surely, 2^{1247654247613} is an apocalyptic number.

It is an amenable number.

1247654247613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247654247613 is an equidigital number, since it uses as much as digits as its factorization.

1247654247613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 52.

The spelling of 1247654247613 in words is "one trillion, two hundred forty-seven billion, six hundred fifty-four million, two hundred forty-seven thousand, six hundred thirteen".