134966581 has 2 divisors, whose sum is σ = 134966582. Its totient is φ = 134966580.

The previous prime is 134966543. The next prime is 134966593. The reversal of 134966581 is 185669431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78039556 + 56927025 = 8834^2 + 7545^2 .

It is a cyclic number.

It is not a de Polignac number, because 134966581 - 2²³ = 126577973 is a prime.

It is a super-2 number, since 2×134966581² = 36431955973659122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134966501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67483290 + 67483291.

It is an arithmetic number, because the mean of its divisors is an integer number (67483291).

Almost surely, 2^134966581 is an apocalyptic number.

It is an amenable number.

134966581 is a deficient number, since it is larger than the sum of its proper divisors (1).

134966581 is an equidigital number, since it uses as much as digits as its factorization.

134966581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 134966581 is about 11617.5118248272. The cubic root of 134966581 is about 512.9504503717.

The spelling of 134966581 in words is "one hundred thirty-four million, nine hundred sixty-six thousand, five hundred eighty-one".