134420981 has 2 divisors, whose sum is σ = 134420982. Its totient is φ = 134420980.

The previous prime is 134420977. The next prime is 134420999. The reversal of 134420981 is 189024431.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88642225 + 45778756 = 9415^2 + 6766^2 .

It is a cyclic number.

It is not a de Polignac number, because 134420981 - 2² = 134420977 is a prime.

It is a super-2 number, since 2×134420981² = 36138000266004722, 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 (134420911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67210490 + 67210491.

It is an arithmetic number, because the mean of its divisors is an integer number (67210491).

Almost surely, 2^134420981 is an apocalyptic number.

It is an amenable number.

134420981 is a deficient number, since it is larger than the sum of its proper divisors (1).

134420981 is an equidigital number, since it uses as much as digits as its factorization.

134420981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 134420981 is about 11594.0062532327. The cubic root of 134420981 is about 512.2583192028.

The spelling of 134420981 in words is "one hundred thirty-four million, four hundred twenty thousand, nine hundred eighty-one".