123000431 has 4 divisors (see below), whose sum is σ = 123114264. Its totient is φ = 122886600.

The previous prime is 123000421. The next prime is 123000473. The reversal of 123000431 is 134000321.

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

It is a cyclic number.

It is not a de Polignac number, because 123000431 - 2¹⁴ = 122984047 is a prime.

It is a super-2 number, since 2×123000431² = 30258212052371522, 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 (123000421) 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 in 3 ways as a sum of consecutive naturals, for example, 55280 + ... + 57461.

It is an arithmetic number, because the mean of its divisors is an integer number (30778566).

Almost surely, 2^123000431 is an apocalyptic number.

123000431 is a deficient number, since it is larger than the sum of its proper divisors (113833).

123000431 is a wasteful number, since it uses less digits than its factorization.

123000431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113832.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123000431 is about 11090.5559373730. Note that the first 3 decimals coincide. The cubic root of 123000431 is about 497.3195642055.

Adding to 123000431 its reverse (134000321), we get a palindrome (257000752).

The spelling of 123000431 in words is "one hundred twenty-three million, four hundred thirty-one", and thus it is an aban number.