135200981 has 2 divisors, whose sum is σ = 135200982. Its totient is φ = 135200980.

The previous prime is 135200963. The next prime is 135201019. The reversal of 135200981 is 189002531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70140625 + 65060356 = 8375^2 + 8066^2 .

It is a cyclic number.

It is not a de Polignac number, because 135200981 - 2¹⁴ = 135184597 is a prime.

It is a super-2 number, since 2×135200981² = 36558610526724722, 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 (135200911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67600490 + 67600491.

It is an arithmetic number, because the mean of its divisors is an integer number (67600491).

Almost surely, 2^135200981 is an apocalyptic number.

It is an amenable number.

135200981 is a deficient number, since it is larger than the sum of its proper divisors (1).

135200981 is an equidigital number, since it uses as much as digits as its factorization.

135200981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 135200981 is about 11627.5956672048. The cubic root of 135200981 is about 513.2472301284.

The spelling of 135200981 in words is "one hundred thirty-five million, two hundred thousand, nine hundred eighty-one".