123206133 has 4 divisors (see below), whose sum is σ = 164274848. Its totient is φ = 82137420.

The previous prime is 123206119. The next prime is 123206143. The reversal of 123206133 is 331602321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123206133 - 2⁴ = 123206117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123206143) 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, 20534353 + ... + 20534358.

It is an arithmetic number, because the mean of its divisors is an integer number (41068712).

Almost surely, 2^123206133 is an apocalyptic number.

It is an amenable number.

123206133 is a deficient number, since it is larger than the sum of its proper divisors (41068715).

123206133 is an equidigital number, since it uses as much as digits as its factorization.

123206133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41068714.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 123206133 is about 11099.8258094440. The cubic root of 123206133 is about 497.5966435988.

Adding to 123206133 its reverse (331602321), we get a palindrome (454808454).

The spelling of 123206133 in words is "one hundred twenty-three million, two hundred six thousand, one hundred thirty-three".