134228681 has 2 divisors, whose sum is σ = 134228682. Its totient is φ = 134228680.

The previous prime is 134228641. The next prime is 134228683. The reversal of 134228681 is 186822431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95726656 + 38502025 = 9784^2 + 6205^2 .

It is an emirp because it is prime and its reverse (186822431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134228681 is a prime.

It is a super-2 number, since 2×134228681² = 36034677605999522, which contains 22 as substring.

Together with 134228683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (134228683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67114340 + 67114341.

It is an arithmetic number, because the mean of its divisors is an integer number (67114341).

Almost surely, 2^134228681 is an apocalyptic number.

It is an amenable number.

134228681 is a deficient number, since it is larger than the sum of its proper divisors (1).

134228681 is an equidigital number, since it uses as much as digits as its factorization.

134228681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 35.

The square root of 134228681 is about 11585.7102069748. The cubic root of 134228681 is about 512.0139270809.

The spelling of 134228681 in words is "one hundred thirty-four million, two hundred twenty-eight thousand, six hundred eighty-one".