133811009 has 2 divisors, whose sum is σ = 133811010. Its totient is φ = 133811008.

The previous prime is 133810979. The next prime is 133811039. The reversal of 133811009 is 900118331.

It is a balanced prime because it is at equal distance from previous prime (133810979) and next prime (133811039).

It can be written as a sum of positive squares in only one way, i.e., 109830400 + 23980609 = 10480^2 + 4897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133811009 is a prime.

It is a super-2 number, since 2×133811009² = 35810772259196162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133811039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66905504 + 66905505.

It is an arithmetic number, because the mean of its divisors is an integer number (66905505).

Almost surely, 2^133811009 is an apocalyptic number.

It is an amenable number.

133811009 is a deficient number, since it is larger than the sum of its proper divisors (1).

133811009 is an equidigital number, since it uses as much as digits as its factorization.

133811009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 133811009 is about 11567.6708545843. The cubic root of 133811009 is about 511.4823067743.

The spelling of 133811009 in words is "one hundred thirty-three million, eight hundred eleven thousand, nine".