84131 has 2 divisors, whose sum is σ = 84132. Its totient is φ = 84130.

The previous prime is 84127. The next prime is 84137. The reversal of 84131 is 13148.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84131 - 2² = 84127 is a prime.

It is a super-2 number, since 2×84131² = 14156050322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (84137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42065 + 42066.

It is an arithmetic number, because the mean of its divisors is an integer number (42066).

2⁸⁴¹³¹ is an apocalyptic number.

84131 is a deficient number, since it is larger than the sum of its proper divisors (1).

84131 is an equidigital number, since it uses as much as digits as its factorization.

84131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96, while the sum is 17.

The square root of 84131 is about 290.0534433514. The cubic root of 84131 is about 43.8179461220.

Adding to 84131 its sum of digits (17), we get a palindrome (84148).

Adding to 84131 its reverse (13148), we get a palindrome (97279).

The spelling of 84131 in words is "eighty-four thousand, one hundred thirty-one".