134168381 has 2 divisors, whose sum is σ = 134168382. Its totient is φ = 134168380.

The previous prime is 134168357. The next prime is 134168383. The reversal of 134168381 is 183861431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120780100 + 13388281 = 10990^2 + 3659^2 .

It is a cyclic number.

It is not a de Polignac number, because 134168381 - 2⁶ = 134168317 is a prime.

It is a super-2 number, since 2×134168381² = 36002308920322322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 134168383, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134168383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67084190 + 67084191.

It is an arithmetic number, because the mean of its divisors is an integer number (67084191).

Almost surely, 2^134168381 is an apocalyptic number.

It is an amenable number.

134168381 is a deficient number, since it is larger than the sum of its proper divisors (1).

134168381 is an equidigital number, since it uses as much as digits as its factorization.

134168381 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 134168381 is about 11583.1075709414. The cubic root of 134168381 is about 511.9372443531.

The spelling of 134168381 in words is "one hundred thirty-four million, one hundred sixty-eight thousand, three hundred eighty-one".