135550403 has 4 divisors (see below), whose sum is σ = 136539960. Its totient is φ = 134560848.

The previous prime is 135550391. The next prime is 135550411. The reversal of 135550403 is 304055531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304055531 = 13 ⋅23388887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135550403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135550433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494573 + ... + 494846.

It is an arithmetic number, because the mean of its divisors is an integer number (34134990).

Almost surely, 2^135550403 is an apocalyptic number.

135550403 is a deficient number, since it is larger than the sum of its proper divisors (989557).

135550403 is an equidigital number, since it uses as much as digits as its factorization.

135550403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989556.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 135550403 is about 11642.6115197579. The cubic root of 135550403 is about 513.6890060057.

The spelling of 135550403 in words is "one hundred thirty-five million, five hundred fifty thousand, four hundred three".