84768181 has 2 divisors, whose sum is σ = 84768182. Its totient is φ = 84768180.

The previous prime is 84768163. The next prime is 84768209. The reversal of 84768181 is 18186748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78163281 + 6604900 = 8841^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 84768181 - 2¹³ = 84759989 is a prime.

It is a super-2 number, since 2×84768181² = 14371289020097522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84768121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42384090 + 42384091.

It is an arithmetic number, because the mean of its divisors is an integer number (42384091).

Almost surely, 2^84768181 is an apocalyptic number.

It is an amenable number.

84768181 is a deficient number, since it is larger than the sum of its proper divisors (1).

84768181 is an equidigital number, since it uses as much as digits as its factorization.

84768181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 43.

The square root of 84768181 is about 9206.9637231826. The cubic root of 84768181 is about 439.2828900882.

The spelling of 84768181 in words is "eighty-four million, seven hundred sixty-eight thousand, one hundred eighty-one".