1380249349 has 2 divisors, whose sum is σ = 1380249350. Its totient is φ = 1380249348.

The previous prime is 1380249331. The next prime is 1380249359. The reversal of 1380249349 is 9439420831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1033172449 + 347076900 = 32143^2 + 18630^2 .

It is an emirp because it is prime and its reverse (9439420831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1380249349 - 2¹³ = 1380241157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380249359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690124674 + 690124675.

It is an arithmetic number, because the mean of its divisors is an integer number (690124675).

Almost surely, 2^1380249349 is an apocalyptic number.

It is an amenable number.

1380249349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380249349 is an equidigital number, since it uses as much as digits as its factorization.

1380249349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 1380249349 is about 37151.7072151469. The cubic root of 1380249349 is about 1113.4033328663.

The spelling of 1380249349 in words is "one billion, three hundred eighty million, two hundred forty-nine thousand, three hundred forty-nine".