133911541 has 2 divisors, whose sum is σ = 133911542. Its totient is φ = 133911540.

The previous prime is 133911539. The next prime is 133911553. The reversal of 133911541 is 145119331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89302500 + 44609041 = 9450^2 + 6679^2 .

It is a cyclic number.

It is not a de Polignac number, because 133911541 - 2¹ = 133911539 is a prime.

Together with 133911539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133911641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66955770 + 66955771.

It is an arithmetic number, because the mean of its divisors is an integer number (66955771).

Almost surely, 2^133911541 is an apocalyptic number.

It is an amenable number.

133911541 is a deficient number, since it is larger than the sum of its proper divisors (1).

133911541 is an equidigital number, since it uses as much as digits as its factorization.

133911541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 28.

The square root of 133911541 is about 11572.0154251539. The cubic root of 133911541 is about 511.6103666593.

It can be divided in two parts, 1339 and 11541, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 133911541 in words is "one hundred thirty-three million, nine hundred eleven thousand, five hundred forty-one".