1338357331 has 2 divisors, whose sum is σ = 1338357332. Its totient is φ = 1338357330.

The previous prime is 1338357323. The next prime is 1338357367. The reversal of 1338357331 is 1337538331.

It is a weak prime.

It is an emirp because it is prime and its reverse (1337538331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1338357331 - 2³ = 1338357323 is a prime.

It is a super-2 number, since 2×1338357331² = 3582400690882887122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1338357311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669178665 + 669178666.

It is an arithmetic number, because the mean of its divisors is an integer number (669178666).

Almost surely, 2^1338357331 is an apocalyptic number.

1338357331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338357331 is an equidigital number, since it uses as much as digits as its factorization.

1338357331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

The square root of 1338357331 is about 36583.5664062431. The cubic root of 1338357331 is about 1102.0230898552.

The spelling of 1338357331 in words is "one billion, three hundred thirty-eight million, three hundred fifty-seven thousand, three hundred thirty-one".