1312429747 has 2 divisors, whose sum is σ = 1312429748. Its totient is φ = 1312429746.

The previous prime is 1312429663. The next prime is 1312429757. The reversal of 1312429747 is 7479242131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312429747 - 2¹⁹ = 1311905459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312429757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656214873 + 656214874.

It is an arithmetic number, because the mean of its divisors is an integer number (656214874).

Almost surely, 2^1312429747 is an apocalyptic number.

1312429747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312429747 is an equidigital number, since it uses as much as digits as its factorization.

1312429747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 1312429747 is about 36227.4722689839. The cubic root of 1312429747 is about 1094.8602497435.

The spelling of 1312429747 in words is "one billion, three hundred twelve million, four hundred twenty-nine thousand, seven hundred forty-seven".