133001001 has 16 divisors (see below), whose sum is σ = 225187200. Its totient is φ = 76000464.

The previous prime is 133000999. The next prime is 133001027. The reversal of 133001001 is 100100331.

It is not a de Polignac number, because 133001001 - 2¹ = 133000999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

133001001 is a modest number, since divided by 1001 gives 133 as remainder.

It is not an unprimeable number, because it can be changed into a prime (133001041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351666 + ... + 352043.

It is an arithmetic number, because the mean of its divisors is an integer number (14074200).

Almost surely, 2^133001001 is an apocalyptic number.

It is an amenable number.

133001001 is a deficient number, since it is larger than the sum of its proper divisors (92186199).

133001001 is an equidigital number, since it uses as much as digits as its factorization.

133001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703725 (or 703719 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 133001001 is about 11532.6059934431. The cubic root of 133001001 is about 510.4481527917.

Adding to 133001001 its reverse (100100331), we get a palindrome (233101332).

The spelling of 133001001 in words is "one hundred thirty-three million, one thousand, one".