136508403 has 4 divisors (see below), whose sum is σ = 182011208. Its totient is φ = 91005600.

The previous prime is 136508401. The next prime is 136508431. The reversal of 136508403 is 304805631.

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

It is not a de Polignac number, because 136508403 - 2¹ = 136508401 is a prime.

It is a super-2 number, since 2×136508403² = 37269088179220818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136508401) 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, 22751398 + ... + 22751403.

It is an arithmetic number, because the mean of its divisors is an integer number (45502802).

Almost surely, 2^136508403 is an apocalyptic number.

136508403 is a deficient number, since it is larger than the sum of its proper divisors (45502805).

136508403 is an equidigital number, since it uses as much as digits as its factorization.

136508403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45502804.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 136508403 is about 11683.6810552154. The cubic root of 136508403 is about 514.8963287723.

The spelling of 136508403 in words is "one hundred thirty-six million, five hundred eight thousand, four hundred three".