72939543 has 8 divisors (see below), whose sum is σ = 99881328. Its totient is φ = 47312064.

The previous prime is 72939539. The next prime is 72939547. The reversal of 72939543 is 34593927.

It is an interprime number because it is at equal distance from previous prime (72939539) and next prime (72939547).

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

It is not a de Polignac number, because 72939543 - 2² = 72939539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72939495 and 72939504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72939547) 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, 328446 + ... + 328667.

It is an arithmetic number, because the mean of its divisors is an integer number (12485166).

Almost surely, 2^72939543 is an apocalyptic number.

72939543 is a deficient number, since it is larger than the sum of its proper divisors (26941785).

72939543 is a wasteful number, since it uses less digits than its factorization.

72939543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657153.

The product of its digits is 204120, while the sum is 42.

The square root of 72939543 is about 8540.4650341770. The cubic root of 72939543 is about 417.8185132025.

It can be divided in two parts, 7293 and 9543, that added together give a triangular number (16836 = T₁₈₃).

The spelling of 72939543 in words is "seventy-two million, nine hundred thirty-nine thousand, five hundred forty-three".