133766539 has 2 divisors, whose sum is σ = 133766540. Its totient is φ = 133766538.

The previous prime is 133766537. The next prime is 133766543. The reversal of 133766539 is 935667331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133766539 - 2¹ = 133766537 is a prime.

Together with 133766537, it forms a pair of twin primes.

It is equal to p_7579492 and since 133766539 and 7579492 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 133766495 and 133766504.

It is not a weakly prime, because it can be changed into another prime (133766533) 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, 66883269 + 66883270.

It is an arithmetic number, because the mean of its divisors is an integer number (66883270).

Almost surely, 2^133766539 is an apocalyptic number.

133766539 is a deficient number, since it is larger than the sum of its proper divisors (1).

133766539 is an equidigital number, since it uses as much as digits as its factorization.

133766539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 43.

The square root of 133766539 is about 11565.7485274408. The cubic root of 133766539 is about 511.4256394429.

It can be divided in two parts, 1337 and 66539, that added together give a palindrome (67876).

The spelling of 133766539 in words is "one hundred thirty-three million, seven hundred sixty-six thousand, five hundred thirty-nine".