84117157 has 2 divisors, whose sum is σ = 84117158. Its totient is φ = 84117156.

The previous prime is 84117151. The next prime is 84117181. The reversal of 84117157 is 75171148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76282756 + 7834401 = 8734^2 + 2799^2 .

It is a cyclic number.

It is not a de Polignac number, because 84117157 - 2⁷ = 84117029 is a prime.

It is a super-2 number, since 2×84117157² = 14151392203525298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84117151) 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, 42058578 + 42058579.

It is an arithmetic number, because the mean of its divisors is an integer number (42058579).

Almost surely, 2^84117157 is an apocalyptic number.

It is an amenable number.

84117157 is a deficient number, since it is larger than the sum of its proper divisors (1).

84117157 is an equidigital number, since it uses as much as digits as its factorization.

84117157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7840, while the sum is 34.

The square root of 84117157 is about 9171.5406012294. The cubic root of 84117157 is about 438.1554270713.

The spelling of 84117157 in words is "eighty-four million, one hundred seventeen thousand, one hundred fifty-seven".