238190923 has 2 divisors, whose sum is σ = 238190924. Its totient is φ = 238190922.

The previous prime is 238190917. The next prime is 238190951. The reversal of 238190923 is 329091832.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 238190923 - 2¹³ = 238182731 is a prime.

It is not a weakly prime, because it can be changed into another prime (238100923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119095461 + 119095462.

It is an arithmetic number, because the mean of its divisors is an integer number (119095462).

Almost surely, 2^238190923 is an apocalyptic number.

238190923 is a deficient number, since it is larger than the sum of its proper divisors (1).

238190923 is an equidigital number, since it uses as much as digits as its factorization.

238190923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 238190923 is about 15433.4352300452. The cubic root of 238190923 is about 619.8811105716.

Subtracting 238190923 from its reverse (329091832), we obtain a palindrome (90900909).

The spelling of 238190923 in words is "two hundred thirty-eight million, one hundred ninety thousand, nine hundred twenty-three".