133539013 has 2 divisors, whose sum is σ = 133539014. Its totient is φ = 133539012.

The previous prime is 133538983. The next prime is 133539023. The reversal of 133539013 is 310935331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126742564 + 6796449 = 11258^2 + 2607^2 .

It is a cyclic number.

It is not a de Polignac number, because 133539013 - 2⁵ = 133538981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133539023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66769506 + 66769507.

It is an arithmetic number, because the mean of its divisors is an integer number (66769507).

Almost surely, 2^133539013 is an apocalyptic number.

It is an amenable number.

133539013 is a deficient number, since it is larger than the sum of its proper divisors (1).

133539013 is an equidigital number, since it uses as much as digits as its factorization.

133539013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 28.

The square root of 133539013 is about 11555.9081425910. The cubic root of 133539013 is about 511.1355104172.

It can be divided in two parts, 13353 and 9013, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 133539013 in words is "one hundred thirty-three million, five hundred thirty-nine thousand, thirteen".