133909011 has 8 divisors (see below), whose sum is σ = 198383760. Its totient is φ = 89272656.

The previous prime is 133909003. The next prime is 133909019. The reversal of 133909011 is 110909331.

It is an interprime number because it is at equal distance from previous prime (133909003) and next prime (133909019).

It is not a de Polignac number, because 133909011 - 2³ = 133909003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4959593 = 133909011 / (1 + 3 + 3 + 9 + 0 + 9 + 0 + 1 + 1).

It is not an unprimeable number, because it can be changed into a prime (133909019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2479770 + ... + 2479823.

It is an arithmetic number, because the mean of its divisors is an integer number (24797970).

Almost surely, 2^133909011 is an apocalyptic number.

133909011 is a deficient number, since it is larger than the sum of its proper divisors (64474749).

133909011 is an equidigital number, since it uses as much as digits as its factorization.

133909011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959602 (or 4959596 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 133909011 is about 11571.9061091939. The cubic root of 133909011 is about 511.6071446757.

The spelling of 133909011 in words is "one hundred thirty-three million, nine hundred nine thousand, eleven".