1319145493 has 2 divisors, whose sum is σ = 1319145494. Its totient is φ = 1319145492.

The previous prime is 1319145491. The next prime is 1319145523. The reversal of 1319145493 is 3945419131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1244184529 + 74960964 = 35273^2 + 8658^2 .

It is an emirp because it is prime and its reverse (3945419131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1319145493 - 2¹ = 1319145491 is a prime.

Together with 1319145491, 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 (1319145491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659572746 + 659572747.

It is an arithmetic number, because the mean of its divisors is an integer number (659572747).

Almost surely, 2^1319145493 is an apocalyptic number.

It is an amenable number.

1319145493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319145493 is an equidigital number, since it uses as much as digits as its factorization.

1319145493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 1319145493 is about 36320.0425798209. The cubic root of 1319145493 is about 1096.7245520372.

The spelling of 1319145493 in words is "one billion, three hundred nineteen million, one hundred forty-five thousand, four hundred ninety-three".