238998923 has 2 divisors, whose sum is σ = 238998924. Its totient is φ = 238998922.

The previous prime is 238998863. The next prime is 238998997. The reversal of 238998923 is 329899832.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238998923 - 2⁸ = 238998667 is a prime.

It is not a weakly prime, because it can be changed into another prime (238968923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119499461 + 119499462.

It is an arithmetic number, because the mean of its divisors is an integer number (119499462).

Almost surely, 2^238998923 is an apocalyptic number.

238998923 is a deficient number, since it is larger than the sum of its proper divisors (1).

238998923 is an equidigital number, since it uses as much as digits as its factorization.

238998923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 53.

The square root of 238998923 is about 15459.5900010317. The cubic root of 238998923 is about 620.5812473166.

Subtracting 238998923 from its reverse (329899832), we obtain a palindrome (90900909).

The spelling of 238998923 in words is "two hundred thirty-eight million, nine hundred ninety-eight thousand, nine hundred twenty-three".