1247740662613 has 4 divisors (see below), whose sum is σ = 1249756399360. Its totient is φ = 1245724925868.

The previous prime is 1247740662589. The next prime is 1247740662617. The reversal of 1247740662613 is 3162660477421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1247740662613 is a prime.

It is a super-2 number, since 2×1247740662613² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247740662617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007867445 + ... + 1007868682.

It is an arithmetic number, because the mean of its divisors is an integer number (312439099840).

Almost surely, 2^{1247740662613} is an apocalyptic number.

It is an amenable number.

1247740662613 is a deficient number, since it is larger than the sum of its proper divisors (2015736747).

1247740662613 is an equidigital number, since it uses as much as digits as its factorization.

1247740662613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015736746.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 1247740662613 in words is "one trillion, two hundred forty-seven billion, seven hundred forty million, six hundred sixty-two thousand, six hundred thirteen".