1338379291 has 2 divisors, whose sum is σ = 1338379292. Its totient is φ = 1338379290.

The previous prime is 1338379271. The next prime is 1338379303. The reversal of 1338379291 is 1929738331.

It is a strong prime.

It is an emirp because it is prime and its reverse (1929738331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1338379291 - 2¹⁵ = 1338346523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338379271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669189645 + 669189646.

It is an arithmetic number, because the mean of its divisors is an integer number (669189646).

Almost surely, 2^1338379291 is an apocalyptic number.

1338379291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338379291 is an equidigital number, since it uses as much as digits as its factorization.

1338379291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 1338379291 is about 36583.8665397741. The cubic root of 1338379291 is about 1102.0291172177.

The spelling of 1338379291 in words is "one billion, three hundred thirty-eight million, three hundred seventy-nine thousand, two hundred ninety-one".