1380191389 has 2 divisors, whose sum is σ = 1380191390. Its totient is φ = 1380191388.

The previous prime is 1380191333. The next prime is 1380191411. The reversal of 1380191389 is 9831910831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1354608025 + 25583364 = 36805^2 + 5058^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380191389 - 2⁷ = 1380191261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380198389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690095694 + 690095695.

It is an arithmetic number, because the mean of its divisors is an integer number (690095695).

Almost surely, 2^1380191389 is an apocalyptic number.

It is an amenable number.

1380191389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380191389 is an equidigital number, since it uses as much as digits as its factorization.

1380191389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 1380191389 is about 37150.9271620507. The cubic root of 1380191389 is about 1113.3877478175.

The spelling of 1380191389 in words is "one billion, three hundred eighty million, one hundred ninety-one thousand, three hundred eighty-nine".