1380057493 has 2 divisors, whose sum is σ = 1380057494. Its totient is φ = 1380057492.

The previous prime is 1380057451. The next prime is 1380057529. The reversal of 1380057493 is 3947500831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 787475844 + 592581649 = 28062^2 + 24343^2 .

It is an emirp because it is prime and its reverse (3947500831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1380057493 - 2⁹ = 1380056981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380057793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690028746 + 690028747.

It is an arithmetic number, because the mean of its divisors is an integer number (690028747).

Almost surely, 2^1380057493 is an apocalyptic number.

It is an amenable number.

1380057493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380057493 is an equidigital number, since it uses as much as digits as its factorization.

1380057493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1380057493 is about 37149.1250637212. The cubic root of 1380057493 is about 1113.3517424277.

The spelling of 1380057493 in words is "one billion, three hundred eighty million, fifty-seven thousand, four hundred ninety-three".