133403441 has 4 divisors (see below), whose sum is σ = 134202432. Its totient is φ = 132604452.

The previous prime is 133403407. The next prime is 133403449. The reversal of 133403441 is 144304331.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133403441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133403449) 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, 399245 + ... + 399578.

It is an arithmetic number, because the mean of its divisors is an integer number (33550608).

Almost surely, 2^133403441 is an apocalyptic number.

It is an amenable number.

133403441 is a deficient number, since it is larger than the sum of its proper divisors (798991).

133403441 is an equidigital number, since it uses as much as digits as its factorization.

133403441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798990.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 133403441 is about 11550.0407358589. The cubic root of 133403441 is about 510.9624795171.

Adding to 133403441 its reverse (144304331), we get a palindrome (277707772).

The spelling of 133403441 in words is "one hundred thirty-three million, four hundred three thousand, four hundred forty-one".