133400401 has 4 divisors (see below), whose sum is σ = 133607232. Its totient is φ = 133193572.

The previous prime is 133400381. The next prime is 133400441. The reversal of 133400401 is 104004331.

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: 104004331 = 41 ⋅2536691.

It is a cyclic number.

It is not a de Polignac number, because 133400401 - 2⁵ = 133400369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133400441) 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, 102445 + ... + 103738.

It is an arithmetic number, because the mean of its divisors is an integer number (33401808).

Almost surely, 2^133400401 is an apocalyptic number.

It is an amenable number.

133400401 is a deficient number, since it is larger than the sum of its proper divisors (206831).

133400401 is an equidigital number, since it uses as much as digits as its factorization.

133400401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206830.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 133400401 is about 11549.9091338417. The cubic root of 133400401 is about 510.9585982135.

Adding to 133400401 its reverse (104004331), we get a palindrome (237404732).

The spelling of 133400401 in words is "one hundred thirty-three million, four hundred thousand, four hundred one".