1338394571 has 2 divisors, whose sum is σ = 1338394572. Its totient is φ = 1338394570.

The previous prime is 1338394559. The next prime is 1338394579. The reversal of 1338394571 is 1754938331.

It is a strong prime.

It is an emirp because it is prime and its reverse (1754938331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1338394571 - 2²² = 1334200267 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338394579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669197285 + 669197286.

It is an arithmetic number, because the mean of its divisors is an integer number (669197286).

Almost surely, 2^1338394571 is an apocalyptic number.

1338394571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338394571 is an equidigital number, since it uses as much as digits as its factorization.

1338394571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 1338394571 is about 36584.0753744030. The cubic root of 1338394571 is about 1102.0333110814.

The spelling of 1338394571 in words is "one billion, three hundred thirty-eight million, three hundred ninety-four thousand, five hundred seventy-one".