1247986706387 has 2 divisors, whose sum is σ = 1247986706388. Its totient is φ = 1247986706386.

The previous prime is 1247986706383. The next prime is 1247986706429. The reversal of 1247986706387 is 7836076897421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1247986706387 - 2² = 1247986706383 is a prime.

It is not a weakly prime, because it can be changed into another prime (1247986706383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623993353193 + 623993353194.

It is an arithmetic number, because the mean of its divisors is an integer number (623993353194).

Almost surely, 2^{1247986706387} is an apocalyptic number.

1247986706387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247986706387 is an equidigital number, since it uses as much as digits as its factorization.

1247986706387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170698752, while the sum is 68.

The spelling of 1247986706387 in words is "one trillion, two hundred forty-seven billion, nine hundred eighty-six million, seven hundred six thousand, three hundred eighty-seven".