123489431 has 4 divisors (see below), whose sum is σ = 132988632. Its totient is φ = 113990232.

The previous prime is 123489427. The next prime is 123489433. The reversal of 123489431 is 134984321.

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 123489431 - 2² = 123489427 is a prime.

It is a super-2 number, since 2×123489431² = 30499279137407522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123489391 and 123489400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123489433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4749581 + ... + 4749606.

It is an arithmetic number, because the mean of its divisors is an integer number (33247158).

Almost surely, 2^123489431 is an apocalyptic number.

123489431 is a deficient number, since it is larger than the sum of its proper divisors (9499201).

123489431 is an equidigital number, since it uses as much as digits as its factorization.

123489431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9499200.

The product of its digits is 20736, while the sum is 35.

The square root of 123489431 is about 11112.5798534814. The cubic root of 123489431 is about 497.9777399554.

The spelling of 123489431 in words is "one hundred twenty-three million, four hundred eighty-nine thousand, four hundred thirty-one".