133404641 has 4 divisors (see below), whose sum is σ = 133694484. Its totient is φ = 133114800.

The previous prime is 133404631. The next prime is 133404671. The reversal of 133404641 is 146404331.

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 90174016 + 43230625 = 9496^2 + 6575^2 .

It is a cyclic number.

It is not a de Polignac number, because 133404641 - 2¹⁸ = 133142497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133404641.

It is not an unprimeable number, because it can be changed into a prime (133404631) 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, 144230 + ... + 145151.

It is an arithmetic number, because the mean of its divisors is an integer number (33423621).

Almost surely, 2^133404641 is an apocalyptic number.

It is an amenable number.

133404641 is a deficient number, since it is larger than the sum of its proper divisors (289843).

133404641 is an equidigital number, since it uses as much as digits as its factorization.

133404641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289842.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 133404641 is about 11550.0926836108. The cubic root of 133404641 is about 510.9640115943.

Adding to 133404641 its reverse (146404331), we get a palindrome (279808972).

The spelling of 133404641 in words is "one hundred thirty-three million, four hundred four thousand, six hundred forty-one".