133519901 has 2 divisors, whose sum is σ = 133519902. Its totient is φ = 133519900.

The previous prime is 133519873. The next prime is 133519913. The reversal of 133519901 is 109915331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119464900 + 14055001 = 10930^2 + 3749^2 .

It is an emirp because it is prime and its reverse (109915331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133519901 - 2²² = 129325597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133519931) 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, 66759950 + 66759951.

It is an arithmetic number, because the mean of its divisors is an integer number (66759951).

Almost surely, 2^133519901 is an apocalyptic number.

It is an amenable number.

133519901 is a deficient number, since it is larger than the sum of its proper divisors (1).

133519901 is an equidigital number, since it uses as much as digits as its factorization.

133519901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3645, while the sum is 32.

The square root of 133519901 is about 11555.0811766945. The cubic root of 133519901 is about 511.1111248145. Note that the first 4 decimals are identical.

The spelling of 133519901 in words is "one hundred thirty-three million, five hundred nineteen thousand, nine hundred one".