84955861 has 2 divisors, whose sum is σ = 84955862. Its totient is φ = 84955860.

The previous prime is 84955807. The next prime is 84955879. The reversal of 84955861 is 16855948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61858225 + 23097636 = 7865^2 + 4806^2 .

It is a cyclic number.

It is not a de Polignac number, because 84955861 - 2⁹ = 84955349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84955361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42477930 + 42477931.

It is an arithmetic number, because the mean of its divisors is an integer number (42477931).

Almost surely, 2^84955861 is an apocalyptic number.

It is an amenable number.

84955861 is a deficient number, since it is larger than the sum of its proper divisors (1).

84955861 is an equidigital number, since it uses as much as digits as its factorization.

84955861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 46.

The square root of 84955861 is about 9217.1503730817. The cubic root of 84955861 is about 439.6068475032.

The spelling of 84955861 in words is "eighty-four million, nine hundred fifty-five thousand, eight hundred sixty-one".