238783133 has 2 divisors, whose sum is σ = 238783134. Its totient is φ = 238783132.

The previous prime is 238783123. The next prime is 238783147. The reversal of 238783133 is 331387832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202265284 + 36517849 = 14222^2 + 6043^2 .

It is a cyclic number.

It is not a de Polignac number, because 238783133 - 2⁴ = 238783117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238783123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119391566 + 119391567.

It is an arithmetic number, because the mean of its divisors is an integer number (119391567).

Almost surely, 2^238783133 is an apocalyptic number.

It is an amenable number.

238783133 is a deficient number, since it is larger than the sum of its proper divisors (1).

238783133 is an equidigital number, since it uses as much as digits as its factorization.

238783133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 238783133 is about 15452.6092618690. The cubic root of 238783133 is about 620.3944186488.

The spelling of 238783133 in words is "two hundred thirty-eight million, seven hundred eighty-three thousand, one hundred thirty-three".