1438399 has 2 divisors, whose sum is σ = 1438400. Its totient is φ = 1438398.

The previous prime is 1438379. The next prime is 1438417. The reversal of 1438399 is 9938341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1438399 - 2⁷ = 1438271 is a prime.

1438399 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719199 + 719200.

It is an arithmetic number, because the mean of its divisors is an integer number (719200).

2^1438399 is an apocalyptic number.

1438399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438399 is an equidigital number, since it uses as much as digits as its factorization.

1438399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 1438399 is about 1199.3327311468. The cubic root of 1438399 is about 112.8824579831.

The spelling of 1438399 in words is "one million, four hundred thirty-eight thousand, three hundred ninety-nine".