123486729 has 8 divisors (see below), whose sum is σ = 165305952. Its totient is φ = 81996000.

The previous prime is 123486721. The next prime is 123486761. The reversal of 123486729 is 927684321.

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

It is not a de Polignac number, because 123486729 - 2³ = 123486721 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123486721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81244 + ... + 82749.

It is an arithmetic number, because the mean of its divisors is an integer number (20663244).

Almost surely, 2^123486729 is an apocalyptic number.

It is an amenable number.

123486729 is a deficient number, since it is larger than the sum of its proper divisors (41819223).

123486729 is a wasteful number, since it uses less digits than its factorization.

123486729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164247.

The product of its digits is 145152, while the sum is 42.

The square root of 123486729 is about 11112.4582788868. The cubic root of 123486729 is about 497.9741079424.

The spelling of 123486729 in words is "one hundred twenty-three million, four hundred eighty-six thousand, seven hundred twenty-nine".