123450789 has 32 divisors (see below), whose sum is σ = 205802496. Its totient is φ = 63947520.

The previous prime is 123450779. The next prime is 123450791. The reversal of 123450789 is 987054321.

It is not a de Polignac number, because 123450789 - 2⁷ = 123450661 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123450739) 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 31 ways as a sum of consecutive naturals, for example, 125869 + ... + 126845.

It is an arithmetic number, because the mean of its divisors is an integer number (6431328).

Almost surely, 2^123450789 is an apocalyptic number.

It is an amenable number.

123450789 is a deficient number, since it is larger than the sum of its proper divisors (82351707).

123450789 is a wasteful number, since it uses less digits than its factorization.

123450789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 123450789 is about 11110.8410572737. The cubic root of 123450789 is about 497.9257925589.

The spelling of 123450789 in words is "one hundred twenty-three million, four hundred fifty thousand, seven hundred eighty-nine".