84387168317 has 2 divisors, whose sum is σ = 84387168318. Its totient is φ = 84387168316.

The previous prime is 84387168287. The next prime is 84387168329. The reversal of 84387168317 is 71386178348.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62347093636 + 22040074681 = 249694^2 + 148459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84387168317 is a prime.

It is a super-2 number, since 2×84387168317² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84387164317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42193584158 + 42193584159.

It is an arithmetic number, because the mean of its divisors is an integer number (42193584159).

Almost surely, 2^84387168317 is an apocalyptic number.

It is an amenable number.

84387168317 is a deficient number, since it is larger than the sum of its proper divisors (1).

84387168317 is an equidigital number, since it uses as much as digits as its factorization.

84387168317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5419008, while the sum is 56.

The spelling of 84387168317 in words is "eighty-four billion, three hundred eighty-seven million, one hundred sixty-eight thousand, three hundred seventeen".