1438117379 has 2 divisors, whose sum is σ = 1438117380. Its totient is φ = 1438117378.

The previous prime is 1438117349. The next prime is 1438117427. The reversal of 1438117379 is 9737118341.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9737118341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1438117379 - 2⁸ = 1438117123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1438117349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719058689 + 719058690.

It is an arithmetic number, because the mean of its divisors is an integer number (719058690).

Almost surely, 2^1438117379 is an apocalyptic number.

1438117379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438117379 is an equidigital number, since it uses as much as digits as its factorization.

1438117379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 1438117379 is about 37922.5180994090. The cubic root of 1438117379 is about 1128.7509049889.

The spelling of 1438117379 in words is "one billion, four hundred thirty-eight million, one hundred seventeen thousand, three hundred seventy-nine".