1238738351 has 2 divisors, whose sum is σ = 1238738352. Its totient is φ = 1238738350.

The previous prime is 1238738341. The next prime is 1238738353. The reversal of 1238738351 is 1538378321.

It is a strong prime.

It is an emirp because it is prime and its reverse (1538378321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1238738351 - 2⁶ = 1238738287 is a prime.

Together with 1238738353, 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 = 1238738299 and 1238738308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238738353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619369175 + 619369176.

It is an arithmetic number, because the mean of its divisors is an integer number (619369176).

Almost surely, 2^1238738351 is an apocalyptic number.

1238738351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238738351 is an equidigital number, since it uses as much as digits as its factorization.

1238738351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 1238738351 is about 35195.7149522495. The cubic root of 1238738351 is about 1073.9725827493.

The spelling of 1238738351 in words is "one billion, two hundred thirty-eight million, seven hundred thirty-eight thousand, three hundred fifty-one".