1312639147 has 2 divisors, whose sum is σ = 1312639148. Its totient is φ = 1312639146.

The previous prime is 1312639129. The next prime is 1312639189. The reversal of 1312639147 is 7419362131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312639147 - 2⁷ = 1312639019 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312639117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656319573 + 656319574.

It is an arithmetic number, because the mean of its divisors is an integer number (656319574).

Almost surely, 2^1312639147 is an apocalyptic number.

1312639147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312639147 is an equidigital number, since it uses as much as digits as its factorization.

1312639147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 1312639147 is about 36230.3622256251. The cubic root of 1312639147 is about 1094.9184754745.

The spelling of 1312639147 in words is "one billion, three hundred twelve million, six hundred thirty-nine thousand, one hundred forty-seven".