134641681 has 2 divisors, whose sum is σ = 134641682. Its totient is φ = 134641680.

The previous prime is 134641627. The next prime is 134641697. The reversal of 134641681 is 186146431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125641681 + 9000000 = 11209^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 134641681 - 2¹⁷ = 134510609 is a prime.

It is a super-2 number, since 2×134641681² = 36256764525011522, which contains 22 as substring.

It is equal to p_7626238 and since 134641681 and 7626238 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (134641601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67320840 + 67320841.

It is an arithmetic number, because the mean of its divisors is an integer number (67320841).

Almost surely, 2^134641681 is an apocalyptic number.

It is an amenable number.

134641681 is a deficient number, since it is larger than the sum of its proper divisors (1).

134641681 is an equidigital number, since it uses as much as digits as its factorization.

134641681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 34.

The square root of 134641681 is about 11603.5201986294. The cubic root of 134641681 is about 512.5385175096.

The spelling of 134641681 in words is "one hundred thirty-four million, six hundred forty-one thousand, six hundred eighty-one".