133632401 has 4 divisors (see below), whose sum is σ = 152722752. Its totient is φ = 114542052.

The previous prime is 133632397. The next prime is 133632409. The reversal of 133632401 is 104236331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 104236331 = 1723 ⋅60497.

It is a cyclic number.

It is not a de Polignac number, because 133632401 - 2² = 133632397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133632409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9545165 + ... + 9545178.

It is an arithmetic number, because the mean of its divisors is an integer number (38180688).

Almost surely, 2^133632401 is an apocalyptic number.

It is an amenable number.

133632401 is a deficient number, since it is larger than the sum of its proper divisors (19090351).

133632401 is an equidigital number, since it uses as much as digits as its factorization.

133632401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19090350.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 133632401 is about 11559.9481400221. The cubic root of 133632401 is about 511.2546336582.

Adding to 133632401 its reverse (104236331), we get a palindrome (237868732).

The spelling of 133632401 in words is "one hundred thirty-three million, six hundred thirty-two thousand, four hundred one".