133378517 has 2 divisors, whose sum is σ = 133378518. Its totient is φ = 133378516.

The previous prime is 133378507. The next prime is 133378529. The reversal of 133378517 is 715873331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115111441 + 18267076 = 10729^2 + 4274^2 .

It is a cyclic number.

It is not a de Polignac number, because 133378517 - 2¹⁴ = 133362133 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133378507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66689258 + 66689259.

It is an arithmetic number, because the mean of its divisors is an integer number (66689259).

Almost surely, 2^133378517 is an apocalyptic number.

It is an amenable number.

133378517 is a deficient number, since it is larger than the sum of its proper divisors (1).

133378517 is an equidigital number, since it uses as much as digits as its factorization.

133378517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 133378517 is about 11548.9617282247. The cubic root of 133378517 is about 510.9306561949.

The spelling of 133378517 in words is "one hundred thirty-three million, three hundred seventy-eight thousand, five hundred seventeen".