1247379307 has 2 divisors, whose sum is σ = 1247379308. Its totient is φ = 1247379306.

The previous prime is 1247379293. The next prime is 1247379311. The reversal of 1247379307 is 7039737421.

It is a strong prime.

It is an emirp because it is prime and its reverse (7039737421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1247379307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1247379377) 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, 623689653 + 623689654.

It is an arithmetic number, because the mean of its divisors is an integer number (623689654).

Almost surely, 2^1247379307 is an apocalyptic number.

1247379307 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247379307 is an equidigital number, since it uses as much as digits as its factorization.

1247379307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 43.

The square root of 1247379307 is about 35318.2574173755. The cubic root of 1247379307 is about 1076.4640033750.

The spelling of 1247379307 in words is "one billion, two hundred forty-seven million, three hundred seventy-nine thousand, three hundred seven".