1380280379 has 2 divisors, whose sum is σ = 1380280380. Its totient is φ = 1380280378.

The previous prime is 1380280373. The next prime is 1380280387. The reversal of 1380280379 is 9730820831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1380280379 - 2¹² = 1380276283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1380280373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690140189 + 690140190.

It is an arithmetic number, because the mean of its divisors is an integer number (690140190).

Almost surely, 2^1380280379 is an apocalyptic number.

1380280379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380280379 is an equidigital number, since it uses as much as digits as its factorization.

1380280379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1380280379 is about 37152.1248248334. The cubic root of 1380280379 is about 1113.4116764425.

The spelling of 1380280379 in words is "one billion, three hundred eighty million, two hundred eighty thousand, three hundred seventy-nine".