84317381 has 2 divisors, whose sum is σ = 84317382. Its totient is φ = 84317380.

The previous prime is 84317371. The next prime is 84317419. The reversal of 84317381 is 18371348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63760225 + 20557156 = 7985^2 + 4534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84317381 is a prime.

It is a super-2 number, since 2×84317381² = 14218841477398322, 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 (84317351) 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, 42158690 + 42158691.

It is an arithmetic number, because the mean of its divisors is an integer number (42158691).

Almost surely, 2^84317381 is an apocalyptic number.

It is an amenable number.

84317381 is a deficient number, since it is larger than the sum of its proper divisors (1).

84317381 is an equidigital number, since it uses as much as digits as its factorization.

84317381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 84317381 is about 9182.4496187020. The cubic root of 84317381 is about 438.5027986024.

The spelling of 84317381 in words is "eighty-four million, three hundred seventeen thousand, three hundred eighty-one".