133503401 has 2 divisors, whose sum is σ = 133503402. Its totient is φ = 133503400.

The previous prime is 133503379. The next prime is 133503407. The reversal of 133503401 is 104305331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110271001 + 23232400 = 10501^2 + 4820^2 .

It is a cyclic number.

It is not a de Polignac number, because 133503401 - 2²² = 129309097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133503407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66751700 + 66751701.

It is an arithmetic number, because the mean of its divisors is an integer number (66751701).

Almost surely, 2^133503401 is an apocalyptic number.

It is an amenable number.

133503401 is a deficient number, since it is larger than the sum of its proper divisors (1).

133503401 is an equidigital number, since it uses as much as digits as its factorization.

133503401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 133503401 is about 11554.3671830179. The cubic root of 133503401 is about 511.0900700730.

Adding to 133503401 its reverse (104305331), we get a palindrome (237808732).

The spelling of 133503401 in words is "one hundred thirty-three million, five hundred three thousand, four hundred one".