133620401 has 4 divisors (see below), whose sum is σ = 133860852. Its totient is φ = 133379952.

The previous prime is 133620329. The next prime is 133620413. The reversal of 133620401 is 104026331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63043600 + 70576801 = 7940^2 + 8401^2 .

It is a cyclic number.

It is not a de Polignac number, because 133620401 - 2¹⁰ = 133619377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133620481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119390 + ... + 120503.

It is an arithmetic number, because the mean of its divisors is an integer number (33465213).

Almost surely, 2^133620401 is an apocalyptic number.

It is an amenable number.

133620401 is a deficient number, since it is larger than the sum of its proper divisors (240451).

133620401 is an equidigital number, since it uses as much as digits as its factorization.

133620401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240450.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 133620401 is about 11559.4290948991. The cubic root of 133620401 is about 511.2393298865.

Adding to 133620401 its reverse (104026331), we get a palindrome (237646732).

The spelling of 133620401 in words is "one hundred thirty-three million, six hundred twenty thousand, four hundred one".