134621881 has 2 divisors, whose sum is σ = 134621882. Its totient is φ = 134621880.

The previous prime is 134621869. The next prime is 134621891. The reversal of 134621881 is 188126431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115777600 + 18844281 = 10760^2 + 4341^2 .

It is an emirp because it is prime and its reverse (188126431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134621881 - 2²¹ = 132524729 is a prime.

It is a super-2 number, since 2×134621881² = 36246101687956322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (134621801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67310940 + 67310941.

It is an arithmetic number, because the mean of its divisors is an integer number (67310941).

Almost surely, 2^134621881 is an apocalyptic number.

It is an amenable number.

134621881 is a deficient number, since it is larger than the sum of its proper divisors (1).

134621881 is an equidigital number, since it uses as much as digits as its factorization.

134621881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 134621881 is about 11602.6669778978. Note that the first 3 decimals coincide. The cubic root of 134621881 is about 512.5133921545.

The spelling of 134621881 in words is "one hundred thirty-four million, six hundred twenty-one thousand, eight hundred eighty-one".