84170137 has 2 divisors, whose sum is σ = 84170138. Its totient is φ = 84170136.

The previous prime is 84170129. The next prime is 84170173. The reversal of 84170137 is 73107148.

Together with next prime (84170173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47941776 + 36228361 = 6924^2 + 6019^2 .

It is a cyclic number.

It is not a de Polignac number, because 84170137 - 2³ = 84170129 is a prime.

It is a super-2 number, since 2×84170137² = 14169223925197538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 84170099 and 84170108.

It is not a weakly prime, because it can be changed into another prime (84170117) 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, 42085068 + 42085069.

It is an arithmetic number, because the mean of its divisors is an integer number (42085069).

Almost surely, 2^84170137 is an apocalyptic number.

It is an amenable number.

84170137 is a deficient number, since it is larger than the sum of its proper divisors (1).

84170137 is an equidigital number, since it uses as much as digits as its factorization.

84170137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 84170137 is about 9174.4284290630. The cubic root of 84170137 is about 438.2473964289.

The spelling of 84170137 in words is "eighty-four million, one hundred seventy thousand, one hundred thirty-seven".