72163743 has 8 divisors (see below), whose sum is σ = 96416256. Its totient is φ = 48010200.

The previous prime is 72163723. The next prime is 72163747. The reversal of 72163743 is 34736127.

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

It is not a de Polignac number, because 72163743 - 2¹⁴ = 72147359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72163747) 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, 23023 + ... + 25968.

It is an arithmetic number, because the mean of its divisors is an integer number (12052032).

Almost surely, 2^72163743 is an apocalyptic number.

72163743 is a deficient number, since it is larger than the sum of its proper divisors (24252513).

72163743 is a wasteful number, since it uses less digits than its factorization.

72163743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49485.

The product of its digits is 21168, while the sum is 33.

The square root of 72163743 is about 8494.9245435142. The cubic root of 72163743 is about 416.3318954376.

The spelling of 72163743 in words is "seventy-two million, one hundred sixty-three thousand, seven hundred forty-three".