72000043 has 4 divisors (see below), whose sum is σ = 72458800. Its totient is φ = 71541288.

The previous prime is 72000007. The next prime is 72000053. The reversal of 72000043 is 34000027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34000027 = 1783 ⋅19069.

It is a cyclic number.

It is not a de Polignac number, because 72000043 - 2¹³ = 71991851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71999990 and 72000026.

It is not an unprimeable number, because it can be changed into a prime (72000053) 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 3 ways as a sum of consecutive naturals, for example, 229143 + ... + 229456.

It is an arithmetic number, because the mean of its divisors is an integer number (18114700).

Almost surely, 2^72000043 is an apocalyptic number.

72000043 is a deficient number, since it is larger than the sum of its proper divisors (458757).

72000043 is a wasteful number, since it uses less digits than its factorization.

72000043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458756.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 72000043 is about 8485.2839080375. The cubic root of 72000043 is about 416.0168474285.

Subtracting from 72000043 its sum of digits (16), we obtain a palindrome (72000027).

The spelling of 72000043 in words is "seventy-two million, forty-three", and thus it is an aban number and an uban number.