1312001893 has 2 divisors, whose sum is σ = 1312001894. Its totient is φ = 1312001892.

The previous prime is 1312001891. The next prime is 1312001941. The reversal of 1312001893 is 3981002131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1016780769 + 295221124 = 31887^2 + 17182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312001893 - 2¹ = 1312001891 is a prime.

Together with 1312001891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312001891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656000946 + 656000947.

It is an arithmetic number, because the mean of its divisors is an integer number (656000947).

Almost surely, 2^1312001893 is an apocalyptic number.

It is an amenable number.

1312001893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312001893 is an equidigital number, since it uses as much as digits as its factorization.

1312001893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1312001893 is about 36221.5666834001. The cubic root of 1312001893 is about 1094.7412614696.

The spelling of 1312001893 in words is "one billion, three hundred twelve million, one thousand, eight hundred ninety-three".