84170123 has 2 divisors, whose sum is σ = 84170124. Its totient is φ = 84170122.

The previous prime is 84170117. The next prime is 84170129. The reversal of 84170123 is 32107148.

It is a balanced prime because it is at equal distance from previous prime (84170117) and next prime (84170129).

It is a cyclic number.

It is not a de Polignac number, because 84170123 - 2²⁴ = 67392907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84170092 and 84170101.

It is not a weakly prime, because it can be changed into another prime (84170129) 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, 42085061 + 42085062.

It is an arithmetic number, because the mean of its divisors is an integer number (42085062).

Almost surely, 2^84170123 is an apocalyptic number.

84170123 is a deficient number, since it is larger than the sum of its proper divisors (1).

84170123 is an equidigital number, since it uses as much as digits as its factorization.

84170123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 84170123 is about 9174.4276660727. The cubic root of 84170123 is about 438.2473721310.

The spelling of 84170123 in words is "eighty-four million, one hundred seventy thousand, one hundred twenty-three".