233138447 has 2 divisors, whose sum is σ = 233138448. Its totient is φ = 233138446.

The previous prime is 233138431. The next prime is 233138449. The reversal of 233138447 is 744831332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 233138447 - 2⁴ = 233138431 is a prime.

Together with 233138449, 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 (233138449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116569223 + 116569224.

It is an arithmetic number, because the mean of its divisors is an integer number (116569224).

Almost surely, 2^233138447 is an apocalyptic number.

233138447 is a deficient number, since it is larger than the sum of its proper divisors (1).

233138447 is an equidigital number, since it uses as much as digits as its factorization.

233138447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 35.

The square root of 233138447 is about 15268.8718312782. The cubic root of 233138447 is about 615.4668031491.

Adding to 233138447 its reverse (744831332), we get a palindrome (977969779).

The spelling of 233138447 in words is "two hundred thirty-three million, one hundred thirty-eight thousand, four hundred forty-seven".