123020306 has 4 divisors (see below), whose sum is σ = 184530462. Its totient is φ = 61510152.

The previous prime is 123020273. The next prime is 123020309. The reversal of 123020306 is 603020321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 603020321 = 223 ⋅2704127.

It can be written as a sum of positive squares in only one way, i.e., 81739681 + 41280625 = 9041^2 + 6425^2 .

It is not an unprimeable number, because it can be changed into a prime (123020309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30755075 + ... + 30755078.

Almost surely, 2^123020306 is an apocalyptic number.

123020306 is a deficient number, since it is larger than the sum of its proper divisors (61510156).

123020306 is an equidigital number, since it uses as much as digits as its factorization.

123020306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61510155.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 123020306 is about 11091.4519338092. The cubic root of 123020306 is about 497.3463491903.

Adding to 123020306 its reverse (603020321), we get a palindrome (726040627).

The spelling of 123020306 in words is "one hundred twenty-three million, twenty thousand, three hundred six".