136403563 has 4 divisors (see below), whose sum is σ = 144427320. Its totient is φ = 128379808.

The previous prime is 136403557. The next prime is 136403569. The reversal of 136403563 is 365304631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365304631 = 439 ⋅832129.

It is an interprime number because it is at equal distance from previous prime (136403557) and next prime (136403569).

It is a cyclic number.

It is not a de Polignac number, because 136403563 - 2⁹ = 136403051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136403569) 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, 4011853 + ... + 4011886.

It is an arithmetic number, because the mean of its divisors is an integer number (36106830).

Almost surely, 2^136403563 is an apocalyptic number.

136403563 is a deficient number, since it is larger than the sum of its proper divisors (8023757).

136403563 is an equidigital number, since it uses as much as digits as its factorization.

136403563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8023756.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 136403563 is about 11679.1935937375. The cubic root of 136403563 is about 514.7644796081.

The spelling of 136403563 in words is "one hundred thirty-six million, four hundred three thousand, five hundred sixty-three".