72168943 has 16 divisors (see below), whose sum is σ = 90996480. Its totient is φ = 55598400.

The previous prime is 72168913. The next prime is 72168947. The reversal of 72168943 is 34986127.

It is not a de Polignac number, because 72168943 - 2⁹ = 72168431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72168896 and 72168905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72168947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1588 + ... + 12118.

It is an arithmetic number, because the mean of its divisors is an integer number (5687280).

Almost surely, 2^72168943 is an apocalyptic number.

72168943 is a deficient number, since it is larger than the sum of its proper divisors (18827537).

72168943 is a wasteful number, since it uses less digits than its factorization.

72168943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10638.

The product of its digits is 72576, while the sum is 40.

The square root of 72168943 is about 8495.2306031090. The cubic root of 72168943 is about 416.3418952600.

The spelling of 72168943 in words is "seventy-two million, one hundred sixty-eight thousand, nine hundred forty-three".