123430321989 has 32 divisors (see below), whose sum is σ = 197313043200. Its totient is φ = 75807783360.

The previous prime is 123430321967. The next prime is 123430321991. The reversal of 123430321989 is 989123034321.

123430321989 is a `hidden beast` number, since 1 + 23 + 430 + 3 + 2 + 198 + 9 = 666.

It is not a de Polignac number, because 123430321989 - 2⁸ = 123430321733 is a prime.

It is a super-2 number, since 2×123430321989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123430321999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166777 + ... + 524094.

It is an arithmetic number, because the mean of its divisors is an integer number (6166032600).

Almost surely, 2^123430321989 is an apocalyptic number.

It is an amenable number.

123430321989 is a deficient number, since it is larger than the sum of its proper divisors (73882721211).

123430321989 is a wasteful number, since it uses less digits than its factorization.

123430321989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691402 (or 691396 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 123430321989 in words is "one hundred twenty-three billion, four hundred thirty million, three hundred twenty-one thousand, nine hundred eighty-nine".