123434609 has 2 divisors, whose sum is σ = 123434610. Its totient is φ = 123434608.

The previous prime is 123434593. The next prime is 123434651. The reversal of 123434609 is 906434321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114554209 + 8880400 = 10703^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 123434609 - 2⁴ = 123434593 is a prime.

It is a super-2 number, since 2×123434609² = 30472205397965762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123434009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61717304 + 61717305.

It is an arithmetic number, because the mean of its divisors is an integer number (61717305).

Almost surely, 2^123434609 is an apocalyptic number.

It is an amenable number.

123434609 is a deficient number, since it is larger than the sum of its proper divisors (1).

123434609 is an equidigital number, since it uses as much as digits as its factorization.

123434609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 123434609 is about 11110.1129157178. The cubic root of 123434609 is about 497.9040381649.

The spelling of 123434609 in words is "one hundred twenty-three million, four hundred thirty-four thousand, six hundred nine".