84820837 has 4 divisors (see below), whose sum is σ = 89810316. Its totient is φ = 79831360.

The previous prime is 84820787. The next prime is 84820847. The reversal of 84820837 is 73802848.

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 77686596 + 7134241 = 8814^2 + 2671^2 .

It is a cyclic number.

It is not a de Polignac number, because 84820837 - 2¹⁹ = 84296549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84820837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84820847) 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, 2494714 + ... + 2494747.

It is an arithmetic number, because the mean of its divisors is an integer number (22452579).

Almost surely, 2^84820837 is an apocalyptic number.

It is an amenable number.

84820837 is a deficient number, since it is larger than the sum of its proper divisors (4989479).

84820837 is a wasteful number, since it uses less digits than its factorization.

84820837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989478.

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

The square root of 84820837 is about 9209.8228538881. The cubic root of 84820837 is about 439.3738286605.

The spelling of 84820837 in words is "eighty-four million, eight hundred twenty thousand, eight hundred thirty-seven".