84709853 has 2 divisors, whose sum is σ = 84709854. Its totient is φ = 84709852.

The previous prime is 84709843. The next prime is 84709901. The reversal of 84709853 is 35890748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83868964 + 840889 = 9158^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 84709853 - 2⁶ = 84709789 is a prime.

It is equal to p_4927877 and since 84709853 and 4927877 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84709843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42354926 + 42354927.

It is an arithmetic number, because the mean of its divisors is an integer number (42354927).

Almost surely, 2^84709853 is an apocalyptic number.

It is an amenable number.

84709853 is a deficient number, since it is larger than the sum of its proper divisors (1).

84709853 is an equidigital number, since it uses as much as digits as its factorization.

84709853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 84709853 is about 9203.7955757394. The cubic root of 84709853 is about 439.1821118197.

The spelling of 84709853 in words is "eighty-four million, seven hundred nine thousand, eight hundred fifty-three".