133502491 has 2 divisors, whose sum is σ = 133502492. Its totient is φ = 133502490.

The previous prime is 133502477. The next prime is 133502497. The reversal of 133502491 is 194205331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133502491 - 2⁷ = 133502363 is a prime.

It is not a weakly prime, because it can be changed into another prime (133502497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66751245 + 66751246.

It is an arithmetic number, because the mean of its divisors is an integer number (66751246).

Almost surely, 2^133502491 is an apocalyptic number.

133502491 is a deficient number, since it is larger than the sum of its proper divisors (1).

133502491 is an equidigital number, since it uses as much as digits as its factorization.

133502491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 133502491 is about 11554.3278039010. The cubic root of 133502491 is about 511.0889088217.

The spelling of 133502491 in words is "one hundred thirty-three million, five hundred two thousand, four hundred ninety-one".