84173729 has 2 divisors, whose sum is σ = 84173730. Its totient is φ = 84173728.

The previous prime is 84173701. The next prime is 84173777. The reversal of 84173729 is 92737148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81938704 + 2235025 = 9052^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 84173729 - 2¹² = 84169633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84173129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42086864 + 42086865.

It is an arithmetic number, because the mean of its divisors is an integer number (42086865).

Almost surely, 2^84173729 is an apocalyptic number.

It is an amenable number.

84173729 is a deficient number, since it is larger than the sum of its proper divisors (1).

84173729 is an equidigital number, since it uses as much as digits as its factorization.

84173729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 84173729 is about 9174.6241884886. The cubic root of 84173729 is about 438.2536304778.

The spelling of 84173729 in words is "eighty-four million, one hundred seventy-three thousand, seven hundred twenty-nine".