133891501 has 2 divisors, whose sum is σ = 133891502. Its totient is φ = 133891500.

The previous prime is 133891489. The next prime is 133891519. The reversal of 133891501 is 105198331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128255625 + 5635876 = 11325^2 + 2374^2 .

It is a cyclic number.

It is not a de Polignac number, because 133891501 - 2⁵ = 133891469 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133891531) 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, 66945750 + 66945751.

It is an arithmetic number, because the mean of its divisors is an integer number (66945751).

Almost surely, 2^133891501 is an apocalyptic number.

It is an amenable number.

133891501 is a deficient number, since it is larger than the sum of its proper divisors (1).

133891501 is an equidigital number, since it uses as much as digits as its factorization.

133891501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 133891501 is about 11571.1495107444. The cubic root of 133891501 is about 511.5848443801.

The spelling of 133891501 in words is "one hundred thirty-three million, eight hundred ninety-one thousand, five hundred one".