123969789 has 12 divisors (see below), whose sum is σ = 179196576. Its totient is φ = 82586952.

The previous prime is 123969787. The next prime is 123969799. The reversal of 123969789 is 987969321.

It is not a de Polignac number, because 123969789 - 2¹ = 123969787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123969787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10872 + ... + 19134.

It is an arithmetic number, because the mean of its divisors is an integer number (14933048).

Almost surely, 2^123969789 is an apocalyptic number.

It is an amenable number.

123969789 is a deficient number, since it is larger than the sum of its proper divisors (55226787).

123969789 is a wasteful number, since it uses less digits than its factorization.

123969789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9936 (or 9933 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 123969789 is about 11134.1721290808. The cubic root of 123969789 is about 498.6225943249.

The spelling of 123969789 in words is "one hundred twenty-three million, nine hundred sixty-nine thousand, seven hundred eighty-nine".