84658162021 has 4 divisors (see below), whose sum is σ = 86946220492. Its totient is φ = 82370103552.

The previous prime is 84658161997. The next prime is 84658162031. The reversal of 84658162021 is 12026185648.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35302652100 + 49355509921 = 187890^2 + 222161^2 .

It is a cyclic number.

It is not a de Polignac number, because 84658162021 - 2⁷ = 84658161893 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 (84658162031) 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, 1144029180 + ... + 1144029253.

It is an arithmetic number, because the mean of its divisors is an integer number (21736555123).

Almost surely, 2^84658162021 is an apocalyptic number.

It is an amenable number.

84658162021 is a deficient number, since it is larger than the sum of its proper divisors (2288058471).

84658162021 is a wasteful number, since it uses less digits than its factorization.

84658162021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288058470.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 84658162021 in words is "eighty-four billion, six hundred fifty-eight million, one hundred sixty-two thousand, twenty-one".