118238399 has 2 divisors, whose sum is σ = 118238400. Its totient is φ = 118238398.

The previous prime is 118238381. The next prime is 118238401. The reversal of 118238399 is 993832811.

It is a strong prime.

It is an emirp because it is prime and its reverse (993832811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118238399 is a prime.

Together with 118238401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118238299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59119199 + 59119200.

It is an arithmetic number, because the mean of its divisors is an integer number (59119200).

Almost surely, 2^118238399 is an apocalyptic number.

118238399 is a deficient number, since it is larger than the sum of its proper divisors (1).

118238399 is an equidigital number, since it uses as much as digits as its factorization.

118238399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 118238399 is about 10873.7481578341. The cubic root of 118238399 is about 490.8169061107.

The spelling of 118238399 in words is "one hundred eighteen million, two hundred thirty-eight thousand, three hundred ninety-nine".