84438173 has 2 divisors, whose sum is σ = 84438174. Its totient is φ = 84438172.

The previous prime is 84438149. The next prime is 84438199. The reversal of 84438173 is 37183448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52606009 + 31832164 = 7253^2 + 5642^2 .

It is a cyclic number.

It is not a de Polignac number, because 84438173 - 2⁸ = 84437917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84438103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42219086 + 42219087.

It is an arithmetic number, because the mean of its divisors is an integer number (42219087).

Almost surely, 2^84438173 is an apocalyptic number.

It is an amenable number.

84438173 is a deficient number, since it is larger than the sum of its proper divisors (1).

84438173 is an equidigital number, since it uses as much as digits as its factorization.

84438173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 38.

The square root of 84438173 is about 9189.0245945911. The cubic root of 84438173 is about 438.7120965192.

The spelling of 84438173 in words is "eighty-four million, four hundred thirty-eight thousand, one hundred seventy-three".