72835643 has 4 divisors (see below), whose sum is σ = 73409280. Its totient is φ = 72262008.

The previous prime is 72835627. The next prime is 72835657. The reversal of 72835643 is 34653827.

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 72835643 - 2⁴ = 72835627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72835597 and 72835606.

It is not an unprimeable number, because it can be changed into a prime (72835603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286628 + ... + 286881.

It is an arithmetic number, because the mean of its divisors is an integer number (18352320).

Almost surely, 2^72835643 is an apocalyptic number.

72835643 is a deficient number, since it is larger than the sum of its proper divisors (573637).

72835643 is a wasteful number, since it uses less digits than its factorization.

72835643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573636.

The product of its digits is 120960, while the sum is 38.

The square root of 72835643 is about 8534.3800595005. The cubic root of 72835643 is about 417.6200293133.

The spelling of 72835643 in words is "seventy-two million, eight hundred thirty-five thousand, six hundred forty-three".