123133013 has 4 divisors (see below), whose sum is σ = 124516620. Its totient is φ = 121749408.

The previous prime is 123132991. The next prime is 123133019. The reversal of 123133013 is 310331321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16589329 + 106543684 = 4073^2 + 10322^2 .

It is a cyclic number.

It is not a de Polignac number, because 123133013 - 2⁶ = 123132949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123132982 and 123133000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123133019) 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, 691670 + ... + 691847.

It is an arithmetic number, because the mean of its divisors is an integer number (31129155).

Almost surely, 2^123133013 is an apocalyptic number.

It is an amenable number.

123133013 is a deficient number, since it is larger than the sum of its proper divisors (1383607).

123133013 is an equidigital number, since it uses as much as digits as its factorization.

123133013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383606.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 123133013 is about 11096.5315752266. The cubic root of 123133013 is about 497.4981867395.

Adding to 123133013 its reverse (310331321), we get a palindrome (433464334).

The spelling of 123133013 in words is "one hundred twenty-three million, one hundred thirty-three thousand, thirteen".