123204431 has 8 divisors (see below), whose sum is σ = 140885280. Its totient is φ = 105543648.

The previous prime is 123204397. The next prime is 123204439. The reversal of 123204431 is 134402321.

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

It is a de Polignac number, because none of the positive numbers 2^k-123204431 is a prime.

It is a super-2 number, since 2×123204431² = 30358663636067522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123204439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12005 + ... + 19761.

It is an arithmetic number, because the mean of its divisors is an integer number (17610660).

Almost surely, 2^123204431 is an apocalyptic number.

123204431 is a deficient number, since it is larger than the sum of its proper divisors (17680849).

123204431 is an equidigital number, since it uses as much as digits as its factorization.

123204431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10033.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 123204431 is about 11099.7491413095. The cubic root of 123204431 is about 497.5943522805.

Adding to 123204431 its reverse (134402321), we get a palindrome (257606752).

The spelling of 123204431 in words is "one hundred twenty-three million, two hundred four thousand, four hundred thirty-one".