1438289999 has 4 divisors (see below), whose sum is σ = 1438377864. Its totient is φ = 1438202136.

The previous prime is 1438289971. The next prime is 1438290017. The reversal of 1438289999 is 9999828341.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9999828341 = 31379 ⋅318679.

It is a cyclic number.

It is not a de Polignac number, because 1438289999 - 2¹² = 1438285903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438289969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11297 + ... + 54810.

It is an arithmetic number, because the mean of its divisors is an integer number (359594466).

Almost surely, 2^1438289999 is an apocalyptic number.

1438289999 is a deficient number, since it is larger than the sum of its proper divisors (87865).

1438289999 is an equidigital number, since it uses as much as digits as its factorization.

1438289999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87864.

The product of its digits is 10077696, while the sum is 62.

The square root of 1438289999 is about 37924.7939875749. The cubic root of 1438289999 is about 1128.7960652307.

The spelling of 1438289999 in words is "one billion, four hundred thirty-eight million, two hundred eighty-nine thousand, nine hundred ninety-nine".