133220987 has 2 divisors, whose sum is σ = 133220988. Its totient is φ = 133220986.

The previous prime is 133220977. The next prime is 133221017. The reversal of 133220987 is 789022331.

It is a weak prime.

It is an emirp because it is prime and its reverse (789022331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133220987 - 2²² = 129026683 is a prime.

It is not a weakly prime, because it can be changed into another prime (133220957) 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, 66610493 + 66610494.

It is an arithmetic number, because the mean of its divisors is an integer number (66610494).

Almost surely, 2^133220987 is an apocalyptic number.

133220987 is a deficient number, since it is larger than the sum of its proper divisors (1).

133220987 is an equidigital number, since it uses as much as digits as its factorization.

133220987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 133220987 is about 11542.1396196719. The cubic root of 133220987 is about 510.7294278514.

The spelling of 133220987 in words is "one hundred thirty-three million, two hundred twenty thousand, nine hundred eighty-seven".