84122249 has 2 divisors, whose sum is σ = 84122250. Its totient is φ = 84122248.

The previous prime is 84122221. The next prime is 84122257. The reversal of 84122249 is 94222148.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51552400 + 32569849 = 7180^2 + 5707^2 .

It is a cyclic number.

It is not a de Polignac number, because 84122249 - 2⁸ = 84121993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84122209) 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, 42061124 + 42061125.

It is an arithmetic number, because the mean of its divisors is an integer number (42061125).

Almost surely, 2^84122249 is an apocalyptic number.

It is an amenable number.

84122249 is a deficient number, since it is larger than the sum of its proper divisors (1).

84122249 is an equidigital number, since it uses as much as digits as its factorization.

84122249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 84122249 is about 9171.8181948837. The cubic root of 84122249 is about 438.1642680834.

The spelling of 84122249 in words is "eighty-four million, one hundred twenty-two thousand, two hundred forty-nine".