82921428287 has 4 divisors (see below), whose sum is σ = 84849833640. Its totient is φ = 80993022936.

The previous prime is 82921428269. The next prime is 82921428329. The reversal of 82921428287 is 78282412928.

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 82921428287 - 2⁶ = 82921428223 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 (82921428257) 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, 964202612 + ... + 964202697.

It is an arithmetic number, because the mean of its divisors is an integer number (21212458410).

Almost surely, 2^82921428287 is an apocalyptic number.

82921428287 is a deficient number, since it is larger than the sum of its proper divisors (1928405353).

82921428287 is a wasteful number, since it uses less digits than its factorization.

82921428287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928405352.

The product of its digits is 2064384, while the sum is 53.

The spelling of 82921428287 in words is "eighty-two billion, nine hundred twenty-one million, four hundred twenty-eight thousand, two hundred eighty-seven".