134395981 has 2 divisors, whose sum is σ = 134395982. Its totient is φ = 134395980.

The previous prime is 134395967. The next prime is 134396039. The reversal of 134395981 is 189593431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127893481 + 6502500 = 11309^2 + 2550^2 .

It is a cyclic number.

It is not a de Polignac number, because 134395981 - 2¹³ = 134387789 is a prime.

It is a super-2 number, since 2×134395981² = 36124559417904722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134395901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67197990 + 67197991.

It is an arithmetic number, because the mean of its divisors is an integer number (67197991).

Almost surely, 2^134395981 is an apocalyptic number.

It is an amenable number.

134395981 is a deficient number, since it is larger than the sum of its proper divisors (1).

134395981 is an equidigital number, since it uses as much as digits as its factorization.

134395981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 134395981 is about 11592.9280598130. The cubic root of 134395981 is about 512.2265601428.

The spelling of 134395981 in words is "one hundred thirty-four million, three hundred ninety-five thousand, nine hundred eighty-one".