84746821 has 4 divisors (see below), whose sum is σ = 89207200. Its totient is φ = 80286444.

The previous prime is 84746803. The next prime is 84746867. The reversal of 84746821 is 12864748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84746821 - 2¹¹ = 84744773 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 (84743821) 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, 2230161 + ... + 2230198.

It is an arithmetic number, because the mean of its divisors is an integer number (22301800).

Almost surely, 2^84746821 is an apocalyptic number.

It is an amenable number.

84746821 is a deficient number, since it is larger than the sum of its proper divisors (4460379).

84746821 is a wasteful number, since it uses less digits than its factorization.

84746821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4460378.

The product of its digits is 86016, while the sum is 40.

The square root of 84746821 is about 9205.8036585624. The cubic root of 84746821 is about 439.2459899579.

The spelling of 84746821 in words is "eighty-four million, seven hundred forty-six thousand, eight hundred twenty-one".