84214981 has 2 divisors, whose sum is σ = 84214982.
Its totient is φ = 84214980.
The previous prime is 84214969. The next prime is 84214993. The reversal of 84214981 is 18941248.
It is a balanced prime because it is at equal distance from previous prime (84214969) and next prime (84214993).
It can be written as a sum of positive squares in only one way, i.e., 74666881 + 9548100 = 8641^2 + 3090^2
It is a cyclic number.
It is not a de Polignac number, because 84214981 - 27 = 84214853 is a prime.
It is a super-2 number, since 2×842149812 = 14184326049660722, which contains 22 as substring.
It is a self number, because there is not a number n which added to its sum of digits gives 84214981.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (84214681) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42107490 + 42107491.
It is an arithmetic number, because the mean of its divisors is an integer number (42107491).
Almost surely, 284214981 is an apocalyptic number.
It is an amenable number.
84214981 is a deficient number, since it is larger than the sum of its proper divisors (1).
84214981 is an equidigital number, since it uses as much as digits as its factorization.
84214981 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 18432, while the sum is 37.
The square root of 84214981 is about 9176.8720705914.
The cubic root of 84214981 is about 438.3252121396.
The spelling of 84214981 in words is "eighty-four million, two hundred fourteen thousand, nine hundred eighty-one".