72543983 has 4 divisors (see below), whose sum is σ = 74087520. Its totient is φ = 71000448.

The previous prime is 72543973. The next prime is 72544009. The reversal of 72543983 is 38934527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72543983 - 2⁸ = 72543727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72543983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72543923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 771698 + ... + 771791.

It is an arithmetic number, because the mean of its divisors is an integer number (18521880).

Almost surely, 2^72543983 is an apocalyptic number.

72543983 is a deficient number, since it is larger than the sum of its proper divisors (1543537).

72543983 is a wasteful number, since it uses less digits than its factorization.

72543983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543536.

The product of its digits is 181440, while the sum is 41.

The square root of 72543983 is about 8517.2755620562. The cubic root of 72543983 is about 417.0618502112.

The spelling of 72543983 in words is "seventy-two million, five hundred forty-three thousand, nine hundred eighty-three".