134443861 has 2 divisors, whose sum is σ = 134443862. Its totient is φ = 134443860.

The previous prime is 134443789. The next prime is 134443873. The reversal of 134443861 is 168344431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84529636 + 49914225 = 9194^2 + 7065^2 .

It is an emirp because it is prime and its reverse (168344431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134443861 - 2⁷ = 134443733 is a prime.

It is a super-4 number, since 4×134443861⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134443061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67221930 + 67221931.

It is an arithmetic number, because the mean of its divisors is an integer number (67221931).

Almost surely, 2^134443861 is an apocalyptic number.

It is an amenable number.

134443861 is a deficient number, since it is larger than the sum of its proper divisors (1).

134443861 is an equidigital number, since it uses as much as digits as its factorization.

134443861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 34.

The square root of 134443861 is about 11594.9929279840. The cubic root of 134443861 is about 512.2873816436.

The spelling of 134443861 in words is "one hundred thirty-four million, four hundred forty-three thousand, eight hundred sixty-one".