134863181 has 2 divisors, whose sum is σ = 134863182. Its totient is φ = 134863180.

The previous prime is 134863177. The next prime is 134863199. The reversal of 134863181 is 181368431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105062500 + 29800681 = 10250^2 + 5459^2 .

It is an emirp because it is prime and its reverse (181368431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134863181 - 2² = 134863177 is a prime.

It is a super-2 number, since 2×134863181² = 36376155178877522, which contains 22 as substring.

It is equal to p_7638119 and since 134863181 and 7638119 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134863081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67431590 + 67431591.

It is an arithmetic number, because the mean of its divisors is an integer number (67431591).

Almost surely, 2^134863181 is an apocalyptic number.

It is an amenable number.

134863181 is a deficient number, since it is larger than the sum of its proper divisors (1).

134863181 is an equidigital number, since it uses as much as digits as its factorization.

134863181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 134863181 is about 11613.0607937787. The cubic root of 134863181 is about 512.8194237955.

The spelling of 134863181 in words is "one hundred thirty-four million, eight hundred sixty-three thousand, one hundred eighty-one".