233138347 has 4 divisors (see below), whose sum is σ = 251072080. Its totient is φ = 215204616.

The previous prime is 233138333. The next prime is 233138393. The reversal of 233138347 is 743831332.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 233138347 - 2⁷ = 233138219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233138447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8966847 + ... + 8966872.

It is an arithmetic number, because the mean of its divisors is an integer number (62768020).

Almost surely, 2^233138347 is an apocalyptic number.

233138347 is a deficient number, since it is larger than the sum of its proper divisors (17933733).

233138347 is a wasteful number, since it uses less digits than its factorization.

233138347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17933732.

The product of its digits is 36288, while the sum is 34.

The square root of 233138347 is about 15268.8685566416. The cubic root of 233138347 is about 615.4667151518.

Adding to 233138347 its reverse (743831332), we get a palindrome (976969679).

The spelling of 233138347 in words is "two hundred thirty-three million, one hundred thirty-eight thousand, three hundred forty-seven".