84305861 has 2 divisors, whose sum is σ = 84305862. Its totient is φ = 84305860.

The previous prime is 84305857. The next prime is 84305887. The reversal of 84305861 is 16850348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76912900 + 7392961 = 8770^2 + 2719^2 .

It is a cyclic number.

It is not a de Polignac number, because 84305861 - 2² = 84305857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84305891) 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, 42152930 + 42152931.

It is an arithmetic number, because the mean of its divisors is an integer number (42152931).

Almost surely, 2^84305861 is an apocalyptic number.

It is an amenable number.

84305861 is a deficient number, since it is larger than the sum of its proper divisors (1).

84305861 is an equidigital number, since it uses as much as digits as its factorization.

84305861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 84305861 is about 9181.8223136804. The cubic root of 84305861 is about 438.4828273056.

The spelling of 84305861 in words is "eighty-four million, three hundred five thousand, eight hundred sixty-one".