133121579 has 2 divisors, whose sum is σ = 133121580. Its totient is φ = 133121578.

The previous prime is 133121567. The next prime is 133121617. The reversal of 133121579 is 975121331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133121579 - 2¹² = 133117483 is a prime.

It is equal to p_7545155 and since 133121579 and 7545155 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (133121179) 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, 66560789 + 66560790.

It is an arithmetic number, because the mean of its divisors is an integer number (66560790).

Almost surely, 2^133121579 is an apocalyptic number.

133121579 is a deficient number, since it is larger than the sum of its proper divisors (1).

133121579 is an equidigital number, since it uses as much as digits as its factorization.

133121579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 32.

The square root of 133121579 is about 11537.8325087514. The cubic root of 133121579 is about 510.6023627258.

The spelling of 133121579 in words is "one hundred thirty-three million, one hundred twenty-one thousand, five hundred seventy-nine".