72899843 has 4 divisors (see below), whose sum is σ = 72971448. Its totient is φ = 72828240.

The previous prime is 72899759. The next prime is 72899851. The reversal of 72899843 is 34899827.

It is a happy number.

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 72899843 - 2²⁰ = 71851267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72899791 and 72899800.

It is not an unprimeable number, because it can be changed into a prime (72899873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34253 + ... + 36318.

It is an arithmetic number, because the mean of its divisors is an integer number (18242862).

Almost surely, 2^72899843 is an apocalyptic number.

72899843 is a deficient number, since it is larger than the sum of its proper divisors (71605).

72899843 is a wasteful number, since it uses less digits than its factorization.

72899843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71604.

The product of its digits is 870912, while the sum is 50.

The square root of 72899843 is about 8538.1404884202. The cubic root of 72899843 is about 417.7426951363.

The spelling of 72899843 in words is "seventy-two million, eight hundred ninety-nine thousand, eight hundred forty-three".