123405533 has 8 divisors (see below), whose sum is σ = 130781952. Its totient is φ = 116042176.

The previous prime is 123405509. The next prime is 123405559. The reversal of 123405533 is 335504321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123405533 - 2⁸ = 123405277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123405593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21716 + ... + 26802.

It is an arithmetic number, because the mean of its divisors is an integer number (16347744).

Almost surely, 2^123405533 is an apocalyptic number.

It is an amenable number.

123405533 is a deficient number, since it is larger than the sum of its proper divisors (7376419).

123405533 is a wasteful number, since it uses less digits than its factorization.

123405533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6531.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 123405533 is about 11108.8043010938. The cubic root of 123405533 is about 497.8649400146.

Adding to 123405533 its reverse (335504321), we get a palindrome (458909854).

The spelling of 123405533 in words is "one hundred twenty-three million, four hundred five thousand, five hundred thirty-three".