238969823 has 2 divisors, whose sum is σ = 238969824. Its totient is φ = 238969822.

The previous prime is 238969817. The next prime is 238969837. The reversal of 238969823 is 328969832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238969823 - 2¹⁰ = 238968799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238969813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119484911 + 119484912.

It is an arithmetic number, because the mean of its divisors is an integer number (119484912).

Almost surely, 2^238969823 is an apocalyptic number.

238969823 is a deficient number, since it is larger than the sum of its proper divisors (1).

238969823 is an equidigital number, since it uses as much as digits as its factorization.

238969823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 238969823 is about 15458.6488090001. The cubic root of 238969823 is about 620.5560594105.

Subtracting 238969823 from its reverse (328969832), we obtain a palindrome (90000009).

The spelling of 238969823 in words is "two hundred thirty-eight million, nine hundred sixty-nine thousand, eight hundred twenty-three".