123189345 has 24 divisors (see below), whose sum is σ = 217152000. Its totient is φ = 64586016.

The previous prime is 123189337. The next prime is 123189371. The reversal of 123189345 is 543981321.

123189345 is a `hidden beast` number, since 1 + 231 + 89 + 345 = 666.

It is not a de Polignac number, because 123189345 - 2³ = 123189337 is a prime.

It is a super-2 number, since 2×123189345² = 30351229443058050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20545 + ... + 25854.

It is an arithmetic number, because the mean of its divisors is an integer number (9048000).

Almost surely, 2^123189345 is an apocalyptic number.

123189345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123189345 is a deficient number, since it is larger than the sum of its proper divisors (93962655).

123189345 is a wasteful number, since it uses less digits than its factorization.

123189345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46469 (or 46466 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 123189345 is about 11099.0695555979. The cubic root of 123189345 is about 497.5740418238.

It can be divided in two parts, 1231893 and 45, that multiplied together give a triangular number (55435185 = T₁₀₅₂₉).

The spelling of 123189345 in words is "one hundred twenty-three million, one hundred eighty-nine thousand, three hundred forty-five".