83728111 has 4 divisors (see below), whose sum is σ = 88653312. Its totient is φ = 78802912.

The previous prime is 83728093. The next prime is 83728121. The reversal of 83728111 is 11182738.

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 83728111 - 2⁹ = 83727599 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 (83728121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2462575 + ... + 2462608.

It is an arithmetic number, because the mean of its divisors is an integer number (22163328).

Almost surely, 2^83728111 is an apocalyptic number.

83728111 is a deficient number, since it is larger than the sum of its proper divisors (4925201).

83728111 is a wasteful number, since it uses less digits than its factorization.

83728111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4925200.

The product of its digits is 2688, while the sum is 31.

The square root of 83728111 is about 9150.3066068848. The cubic root of 83728111 is about 437.4788861647.

The spelling of 83728111 in words is "eighty-three million, seven hundred twenty-eight thousand, one hundred eleven".