123433009 has 20 divisors (see below), whose sum is σ = 145708020. Its totient is φ = 104546400.

The previous prime is 123432983. The next prime is 123433021. The reversal of 123433009 is 900334321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 110986225 + 12446784 = 10535^2 + 3528^2 .

It is not a de Polignac number, because 123433009 - 2⁵ = 123432977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123433049) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 242247 + ... + 242755.

It is an arithmetic number, because the mean of its divisors is an integer number (7285401).

Almost surely, 2^123433009 is an apocalyptic number.

It is an amenable number.

123433009 is a deficient number, since it is larger than the sum of its proper divisors (22275011).

123433009 is an frugal number, since it uses more digits than its factorization.

123433009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 123433009 is about 11110.0409090156. The cubic root of 123433009 is about 497.9018868236.

It can be divided in two parts, 1234 and 33009, that added together give a palindrome (34243).

The spelling of 123433009 in words is "one hundred twenty-three million, four hundred thirty-three thousand, nine".