134645981 has 2 divisors, whose sum is σ = 134645982. Its totient is φ = 134645980.

The previous prime is 134645969. The next prime is 134645993. The reversal of 134645981 is 189546431.

It is a balanced prime because it is at equal distance from previous prime (134645969) and next prime (134645993).

It can be written as a sum of positive squares in only one way, i.e., 117917881 + 16728100 = 10859^2 + 4090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134645981 is a prime.

It is a super-2 number, since 2×134645981² = 36259080398904722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134645881) 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, 67322990 + 67322991.

It is an arithmetic number, because the mean of its divisors is an integer number (67322991).

Almost surely, 2^134645981 is an apocalyptic number.

It is an amenable number.

134645981 is a deficient number, since it is larger than the sum of its proper divisors (1).

134645981 is an equidigital number, since it uses as much as digits as its factorization.

134645981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 134645981 is about 11603.7054857489. The cubic root of 134645981 is about 512.5439737006.

The spelling of 134645981 in words is "one hundred thirty-four million, six hundred forty-five thousand, nine hundred eighty-one".