84268181 has 2 divisors, whose sum is σ = 84268182. Its totient is φ = 84268180.

The previous prime is 84268147. The next prime is 84268187. The reversal of 84268181 is 18186248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80102500 + 4165681 = 8950^2 + 2041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84268181 is a prime.

It is a super-2 number, since 2×84268181² = 14202252658097522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84268187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42134090 + 42134091.

It is an arithmetic number, because the mean of its divisors is an integer number (42134091).

Almost surely, 2^84268181 is an apocalyptic number.

It is an amenable number.

84268181 is a deficient number, since it is larger than the sum of its proper divisors (1).

84268181 is an equidigital number, since it uses as much as digits as its factorization.

84268181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 38.

The square root of 84268181 is about 9179.7702040955. The cubic root of 84268181 is about 438.4174918124.

The spelling of 84268181 in words is "eighty-four million, two hundred sixty-eight thousand, one hundred eighty-one".