1238158147 has 2 divisors, whose sum is σ = 1238158148. Its totient is φ = 1238158146.

The previous prime is 1238158133. The next prime is 1238158157. The reversal of 1238158147 is 7418518321.

It is a strong prime.

It is an emirp because it is prime and its reverse (7418518321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1238158147 - 2¹⁵ = 1238125379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1238158157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619079073 + 619079074.

It is an arithmetic number, because the mean of its divisors is an integer number (619079074).

Almost surely, 2^1238158147 is an apocalyptic number.

1238158147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238158147 is an equidigital number, since it uses as much as digits as its factorization.

1238158147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 40.

The square root of 1238158147 is about 35187.4714493667. The cubic root of 1238158147 is about 1073.8048797258.

The spelling of 1238158147 in words is "one billion, two hundred thirty-eight million, one hundred fifty-eight thousand, one hundred forty-seven".