133400503 has 4 divisors (see below), whose sum is σ = 137005960. Its totient is φ = 129795048.

The previous prime is 133400467. The next prime is 133400521. The reversal of 133400503 is 305004331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133400503 - 2⁹ = 133399991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133400543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802673 + ... + 1802746.

It is an arithmetic number, because the mean of its divisors is an integer number (34251490).

Almost surely, 2^133400503 is an apocalyptic number.

133400503 is a deficient number, since it is larger than the sum of its proper divisors (3605457).

133400503 is an equidigital number, since it uses as much as digits as its factorization.

133400503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3605456.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 133400503 is about 11549.9135494600. The cubic root of 133400503 is about 510.9587284424.

Adding to 133400503 its reverse (305004331), we get a palindrome (438404834).

It can be divided in two parts, 133400 and 503, that added together give a triangular number (133903 = T₅₁₇).

The spelling of 133400503 in words is "one hundred thirty-three million, four hundred thousand, five hundred three".