83128727 has 4 divisors (see below), whose sum is σ = 90685896. Its totient is φ = 75571560.

The previous prime is 83128711. The next prime is 83128729. The reversal of 83128727 is 72782138.

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 83128727 - 2⁴ = 83128711 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 (83128729) 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, 3778568 + ... + 3778589.

It is an arithmetic number, because the mean of its divisors is an integer number (22671474).

Almost surely, 2^83128727 is an apocalyptic number.

83128727 is a deficient number, since it is larger than the sum of its proper divisors (7557169).

83128727 is a wasteful number, since it uses less digits than its factorization.

83128727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7557168.

The product of its digits is 37632, while the sum is 38.

The square root of 83128727 is about 9117.4956539611. The cubic root of 83128727 is about 436.4324592060.

The spelling of 83128727 in words is "eighty-three million, one hundred twenty-eight thousand, seven hundred twenty-seven".