133534409 has 2 divisors, whose sum is σ = 133534410. Its totient is φ = 133534408.

The previous prime is 133534367. The next prime is 133534421. The reversal of 133534409 is 904435331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133518025 + 16384 = 11555^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 133534409 - 2⁸ = 133534153 is a prime.

It is a super-3 number, since 3×133534409³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133534459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66767204 + 66767205.

It is an arithmetic number, because the mean of its divisors is an integer number (66767205).

Almost surely, 2^133534409 is an apocalyptic number.

It is an amenable number.

133534409 is a deficient number, since it is larger than the sum of its proper divisors (1).

133534409 is an equidigital number, since it uses as much as digits as its factorization.

133534409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 133534409 is about 11555.7089354137. The cubic root of 133534409 is about 511.1296362413.

The spelling of 133534409 in words is "one hundred thirty-three million, five hundred thirty-four thousand, four hundred nine".