133562921 has 2 divisors, whose sum is σ = 133562922. Its totient is φ = 133562920.

The previous prime is 133562903. The next prime is 133562929. The reversal of 133562921 is 129265331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84842521 + 48720400 = 9211^2 + 6980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133562921 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (133562929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66781460 + 66781461.

It is an arithmetic number, because the mean of its divisors is an integer number (66781461).

Almost surely, 2^133562921 is an apocalyptic number.

It is an amenable number.

133562921 is a deficient number, since it is larger than the sum of its proper divisors (1).

133562921 is an equidigital number, since it uses as much as digits as its factorization.

133562921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 32.

The square root of 133562921 is about 11556.9425455005. The cubic root of 133562921 is about 511.1660121118.

The spelling of 133562921 in words is "one hundred thirty-three million, five hundred sixty-two thousand, nine hundred twenty-one".