134781181 has 2 divisors, whose sum is σ = 134781182. Its totient is φ = 134781180.

The previous prime is 134781133. The next prime is 134781197. The reversal of 134781181 is 181187431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84015556 + 50765625 = 9166^2 + 7125^2 .

It is an emirp because it is prime and its reverse (181187431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134781181 - 2⁹ = 134780669 is a prime.

It is a super-2 number, since 2×134781181² = 36331933503509522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134781281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67390590 + 67390591.

It is an arithmetic number, because the mean of its divisors is an integer number (67390591).

Almost surely, 2^134781181 is an apocalyptic number.

It is an amenable number.

134781181 is a deficient number, since it is larger than the sum of its proper divisors (1).

134781181 is an equidigital number, since it uses as much as digits as its factorization.

134781181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 34.

The square root of 134781181 is about 11609.5297493051. The cubic root of 134781181 is about 512.7154672819.

It can be divided in two parts, 1347 and 81181, that added together give a palindrome (82528).

The spelling of 134781181 in words is "one hundred thirty-four million, seven hundred eighty-one thousand, one hundred eighty-one".