123023689 has 4 divisors (see below), whose sum is σ = 129498640. Its totient is φ = 116548740.

The previous prime is 123023687. The next prime is 123023699. The reversal of 123023689 is 986320321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123023689 - 2¹ = 123023687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123023683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3237447 + ... + 3237484.

It is an arithmetic number, because the mean of its divisors is an integer number (32374660).

Almost surely, 2^123023689 is an apocalyptic number.

123023689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

123023689 is a deficient number, since it is larger than the sum of its proper divisors (6474951).

123023689 is an equidigital number, since it uses as much as digits as its factorization.

123023689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474950.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 123023689 is about 11091.6044375915. The cubic root of 123023689 is about 497.3509080780.

The spelling of 123023689 in words is "one hundred twenty-three million, twenty-three thousand, six hundred eighty-nine".