134381861 has 2 divisors, whose sum is σ = 134381862. Its totient is φ = 134381860.

The previous prime is 134381843. The next prime is 134381867. The reversal of 134381861 is 168183431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133864900 + 516961 = 11570^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 134381861 - 2¹⁰ = 134380837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134381867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67190930 + 67190931.

It is an arithmetic number, because the mean of its divisors is an integer number (67190931).

Almost surely, 2^134381861 is an apocalyptic number.

It is an amenable number.

134381861 is a deficient number, since it is larger than the sum of its proper divisors (1).

134381861 is an equidigital number, since it uses as much as digits as its factorization.

134381861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 134381861 is about 11592.3190518550. The cubic root of 134381861 is about 512.2086208853.

The spelling of 134381861 in words is "one hundred thirty-four million, three hundred eighty-one thousand, eight hundred sixty-one".