123564729 has 8 divisors (see below), whose sum is σ = 170067712. Its totient is φ = 79719120.

The previous prime is 123564697. The next prime is 123564751. The reversal of 123564729 is 927465321.

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

It is not a de Polignac number, because 123564729 - 2⁵ = 123564697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123564799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664234 + ... + 664419.

It is an arithmetic number, because the mean of its divisors is an integer number (21258464).

Almost surely, 2^123564729 is an apocalyptic number.

It is an amenable number.

123564729 is a deficient number, since it is larger than the sum of its proper divisors (46502983).

123564729 is a wasteful number, since it uses less digits than its factorization.

123564729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1328687.

The product of its digits is 90720, while the sum is 39.

The square root of 123564729 is about 11115.9672993402. The cubic root of 123564729 is about 498.0789337955.

The spelling of 123564729 in words is "one hundred twenty-three million, five hundred sixty-four thousand, seven hundred twenty-nine".