72168503 has 8 divisors (see below), whose sum is σ = 82152576. Its totient is φ = 62755000.

The previous prime is 72168497. The next prime is 72168511. The reversal of 72168503 is 30586127.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-72168503 is a prime.

It is a super-2 number, since 2×72168503² = 10416585650522018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72168503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72168533) 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, 142373 + ... + 142878.

It is an arithmetic number, because the mean of its divisors is an integer number (10269072).

Almost surely, 2^72168503 is an apocalyptic number.

72168503 is a deficient number, since it is larger than the sum of its proper divisors (9984073).

72168503 is a wasteful number, since it uses less digits than its factorization.

72168503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285285.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 72168503 is about 8495.2047061857. The cubic root of 72168503 is about 416.3410491398.

The spelling of 72168503 in words is "seventy-two million, one hundred sixty-eight thousand, five hundred three".