1338918851 has 2 divisors, whose sum is σ = 1338918852. Its totient is φ = 1338918850.

The previous prime is 1338918773. The next prime is 1338918853. The reversal of 1338918851 is 1588198331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1338918851 - 2³⁰ = 265177027 is a prime.

Together with 1338918853, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1338918796 and 1338918805.

It is not a weakly prime, because it can be changed into another prime (1338918853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669459425 + 669459426.

It is an arithmetic number, because the mean of its divisors is an integer number (669459426).

Almost surely, 2^1338918851 is an apocalyptic number.

1338918851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338918851 is an equidigital number, since it uses as much as digits as its factorization.

1338918851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 47.

The square root of 1338918851 is about 36591.2400855724. The cubic root of 1338918851 is about 1102.1771895785.

The spelling of 1338918851 in words is "one billion, three hundred thirty-eight million, nine hundred eighteen thousand, eight hundred fifty-one".