84355261 has 2 divisors, whose sum is σ = 84355262. Its totient is φ = 84355260.

The previous prime is 84355189. The next prime is 84355279. The reversal of 84355261 is 16255348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83375161 + 980100 = 9131^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 84355261 - 2⁷ = 84355133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84355561) 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, 42177630 + 42177631.

It is an arithmetic number, because the mean of its divisors is an integer number (42177631).

Almost surely, 2^84355261 is an apocalyptic number.

It is an amenable number.

84355261 is a deficient number, since it is larger than the sum of its proper divisors (1).

84355261 is an equidigital number, since it uses as much as digits as its factorization.

84355261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 34.

The square root of 84355261 is about 9184.5120175217. The cubic root of 84355261 is about 438.5684552874.

The spelling of 84355261 in words is "eighty-four million, three hundred fifty-five thousand, two hundred sixty-one".