133313403 has 8 divisors (see below), whose sum is σ = 180186448. Its totient is φ = 87657984.

The previous prime is 133313381. The next prime is 133313407. The reversal of 133313403 is 304313331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133313403 - 2⁹ = 133312891 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 133313403.

It is not an unprimeable number, because it can be changed into a prime (133313407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304150 + ... + 304587.

It is an arithmetic number, because the mean of its divisors is an integer number (22523306).

Almost surely, 2^133313403 is an apocalyptic number.

133313403 is a deficient number, since it is larger than the sum of its proper divisors (46873045).

133313403 is an equidigital number, since it uses as much as digits as its factorization.

133313403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608813.

The product of its (nonzero) digits is 972, while the sum is 21.

The square root of 133313403 is about 11546.1423427914. The cubic root of 133313403 is about 510.8474989899.

Adding to 133313403 its reverse (304313331), we get a palindrome (437626734).

The spelling of 133313403 in words is "one hundred thirty-three million, three hundred thirteen thousand, four hundred three".