1247707070647 has 4 divisors (see below), whose sum is σ = 1262739686040. Its totient is φ = 1232674455256.

The previous prime is 1247707070581. The next prime is 1247707070719. The reversal of 1247707070647 is 7460707077421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1247707070647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1247707070594 and 1247707070603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247707070147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7516307572 + ... + 7516307737.

It is an arithmetic number, because the mean of its divisors is an integer number (315684921510).

Almost surely, 2^{1247707070647} is an apocalyptic number.

1247707070647 is a deficient number, since it is larger than the sum of its proper divisors (15032615393).

1247707070647 is an equidigital number, since it uses as much as digits as its factorization.

1247707070647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15032615392.

The product of its (nonzero) digits is 3226944, while the sum is 52.

The spelling of 1247707070647 in words is "one trillion, two hundred forty-seven billion, seven hundred seven million, seventy thousand, six hundred forty-seven".