83871428287 has 4 divisors (see below), whose sum is σ = 85453908120. Its totient is φ = 82288948456.

The previous prime is 83871428279. The next prime is 83871428323. The reversal of 83871428287 is 78282417838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78282417838 = 2 ⋅39141208919.

It is a cyclic number.

It is not a de Polignac number, because 83871428287 - 2³ = 83871428279 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 (83871428227) 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, 791239837 + ... + 791239942.

It is an arithmetic number, because the mean of its divisors is an integer number (21363477030).

Almost surely, 2^83871428287 is an apocalyptic number.

83871428287 is a deficient number, since it is larger than the sum of its proper divisors (1582479833).

83871428287 is a wasteful number, since it uses less digits than its factorization.

83871428287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582479832.

The product of its digits is 9633792, while the sum is 58.

The spelling of 83871428287 in words is "eighty-three billion, eight hundred seventy-one million, four hundred twenty-eight thousand, two hundred eighty-seven".