134118781 has 2 divisors, whose sum is σ = 134118782. Its totient is φ = 134118780.

The previous prime is 134118757. The next prime is 134118799. The reversal of 134118781 is 187811431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76282756 + 57836025 = 8734^2 + 7605^2 .

It is an emirp because it is prime and its reverse (187811431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134118781 - 2¹⁵ = 134086013 is a prime.

It is a super-2 number, since 2×134118781² = 35975694833851922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134118581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67059390 + 67059391.

It is an arithmetic number, because the mean of its divisors is an integer number (67059391).

Almost surely, 2^134118781 is an apocalyptic number.

It is an amenable number.

134118781 is a deficient number, since it is larger than the sum of its proper divisors (1).

134118781 is an equidigital number, since it uses as much as digits as its factorization.

134118781 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 134118781 is about 11580.9663241027. The cubic root of 134118781 is about 511.8741514524.

The spelling of 134118781 in words is "one hundred thirty-four million, one hundred eighteen thousand, seven hundred eighty-one".