72000123 has 8 divisors (see below), whose sum is σ = 103384848. Its totient is φ = 44307744.

The previous prime is 72000121. The next prime is 72000133. The reversal of 72000123 is 32100027.

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

It is not a de Polignac number, because 72000123 - 2¹ = 72000121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72000121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 923040 + ... + 923117.

It is an arithmetic number, because the mean of its divisors is an integer number (12923106).

Almost surely, 2^72000123 is an apocalyptic number.

72000123 is a deficient number, since it is larger than the sum of its proper divisors (31384725).

72000123 is a wasteful number, since it uses less digits than its factorization.

72000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846173.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 72000123 is about 8485.2886220800. The cubic root of 72000123 is about 416.0170015087.

The spelling of 72000123 in words is "seventy-two million, one hundred twenty-three", and thus it is an aban number.