1378199 has 2 divisors, whose sum is σ = 1378200. Its totient is φ = 1378198.

The previous prime is 1378189. The next prime is 1378217. The reversal of 1378199 is 9918731.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1378199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689099 + 689100.

It is an arithmetic number, because the mean of its divisors is an integer number (689100).

2^1378199 is an apocalyptic number.

1378199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378199 is an equidigital number, since it uses as much as digits as its factorization.

1378199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 38.

The square root of 1378199 is about 1173.9672056748. The cubic root of 1378199 is about 111.2851742499.

The spelling of 1378199 in words is "one million, three hundred seventy-eight thousand, one hundred ninety-nine".