133541587 has 2 divisors, whose sum is σ = 133541588. Its totient is φ = 133541586.

The previous prime is 133541581. The next prime is 133541591. The reversal of 133541587 is 785145331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133541587 - 2¹⁵ = 133508819 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133541581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66770793 + 66770794.

It is an arithmetic number, because the mean of its divisors is an integer number (66770794).

Almost surely, 2^133541587 is an apocalyptic number.

133541587 is a deficient number, since it is larger than the sum of its proper divisors (1).

133541587 is an equidigital number, since it uses as much as digits as its factorization.

133541587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 133541587 is about 11556.0195136561. The cubic root of 133541587 is about 511.1387944870.

It can be divided in two parts, 13354 and 1587, that added together give a palindrome (14941).

The spelling of 133541587 in words is "one hundred thirty-three million, five hundred forty-one thousand, five hundred eighty-seven".