72984839 has 4 divisors (see below), whose sum is σ = 73106880. Its totient is φ = 72862800.

The previous prime is 72984827. The next prime is 72984883. The reversal of 72984839 is 93848927.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93848927 = 61 ⋅1538507.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72984839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72984809) 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, 60119 + ... + 61320.

It is an arithmetic number, because the mean of its divisors is an integer number (18276720).

Almost surely, 2^72984839 is an apocalyptic number.

72984839 is a deficient number, since it is larger than the sum of its proper divisors (122041).

72984839 is a wasteful number, since it uses less digits than its factorization.

72984839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122040.

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

The square root of 72984839 is about 8543.1164688303. The cubic root of 72984839 is about 417.9049847758.

The spelling of 72984839 in words is "seventy-two million, nine hundred eighty-four thousand, eight hundred thirty-nine".