123129193 has 8 divisors (see below), whose sum is σ = 134406720. Its totient is φ = 111865680.

The previous prime is 123129103. The next prime is 123129199. The reversal of 123129193 is 391921321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123129193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123129199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24988 + ... + 29506.

It is an arithmetic number, because the mean of its divisors is an integer number (16800840).

Almost surely, 2^123129193 is an apocalyptic number.

It is an amenable number.

123129193 is a deficient number, since it is larger than the sum of its proper divisors (11277527).

123129193 is a wasteful number, since it uses less digits than its factorization.

123129193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7007.

The product of its digits is 2916, while the sum is 31.

The square root of 123129193 is about 11096.3594480352. The cubic root of 123129193 is about 497.4930419976.

The spelling of 123129193 in words is "one hundred twenty-three million, one hundred twenty-nine thousand, one hundred ninety-three".