1380778699 has 2 divisors, whose sum is σ = 1380778700. Its totient is φ = 1380778698.

The previous prime is 1380778649. The next prime is 1380778717. The reversal of 1380778699 is 9968770831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1380778699 - 2⁷ = 1380778571 is a prime.

It is a super-2 number, since 2×1380778699² = 3813099631224265202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1380778639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690389349 + 690389350.

It is an arithmetic number, because the mean of its divisors is an integer number (690389350).

Almost surely, 2^1380778699 is an apocalyptic number.

1380778699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380778699 is an equidigital number, since it uses as much as digits as its factorization.

1380778699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The square root of 1380778699 is about 37158.8307001176. The cubic root of 1380778699 is about 1113.5456512875.

The spelling of 1380778699 in words is "one billion, three hundred eighty million, seven hundred seventy-eight thousand, six hundred ninety-nine".