1312020329 has 2 divisors, whose sum is σ = 1312020330. Its totient is φ = 1312020328.

The previous prime is 1312020323. The next prime is 1312020361. The reversal of 1312020329 is 9230202131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308485929 + 3534400 = 36173^2 + 1880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312020329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312020323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656010164 + 656010165.

It is an arithmetic number, because the mean of its divisors is an integer number (656010165).

Almost surely, 2^1312020329 is an apocalyptic number.

It is an amenable number.

1312020329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312020329 is an equidigital number, since it uses as much as digits as its factorization.

1312020329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1312020329 is about 36221.8211717743. The cubic root of 1312020329 is about 1094.7463891440.

The spelling of 1312020329 in words is "one billion, three hundred twelve million, twenty thousand, three hundred twenty-nine".