233891206129 has 27 divisors (see below), whose sum is σ = 277003722681. Its totient is φ = 196911940680.

The previous prime is 233891206123. The next prime is 233891206169. The reversal of 233891206129 is 921602198332.

The square root of 233891206129 is 483623.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 233891206129 - 2³ = 233891206121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (233891206121) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 199735714 + ... + 199736884.

Almost surely, 2^233891206129 is an apocalyptic number.

233891206129 is the 483623-rd square number.

233891206129 is the 241812-nd centered octagonal number.

It is an amenable number.

233891206129 is a deficient number, since it is larger than the sum of its proper divisors (43112516552).

233891206129 is an frugal number, since it uses more digits than its factorization.

233891206129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 233891206129 in words is "two hundred thirty-three billion, eight hundred ninety-one million, two hundred six thousand, one hundred twenty-nine".