1380021499 has 2 divisors, whose sum is σ = 1380021500. Its totient is φ = 1380021498.

The previous prime is 1380021491. The next prime is 1380021553. The reversal of 1380021499 is 9941200831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1380021499 - 2³ = 1380021491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1380021491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690010749 + 690010750.

It is an arithmetic number, because the mean of its divisors is an integer number (690010750).

Almost surely, 2^1380021499 is an apocalyptic number.

1380021499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380021499 is an equidigital number, since it uses as much as digits as its factorization.

1380021499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1380021499 is about 37148.6406076992. The cubic root of 1380021499 is about 1113.3420630409.

The spelling of 1380021499 in words is "one billion, three hundred eighty million, twenty-one thousand, four hundred ninety-nine".