133579409 has 2 divisors, whose sum is σ = 133579410. Its totient is φ = 133579408.

The previous prime is 133579373. The next prime is 133579487. The reversal of 133579409 is 904975331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132250000 + 1329409 = 11500^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 133579409 - 2⁸ = 133579153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133579109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66789704 + 66789705.

It is an arithmetic number, because the mean of its divisors is an integer number (66789705).

Almost surely, 2^133579409 is an apocalyptic number.

It is an amenable number.

133579409 is a deficient number, since it is larger than the sum of its proper divisors (1).

133579409 is an equidigital number, since it uses as much as digits as its factorization.

133579409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 133579409 is about 11557.6558609434. The cubic root of 133579409 is about 511.1870452906.

The spelling of 133579409 in words is "one hundred thirty-three million, five hundred seventy-nine thousand, four hundred nine".