136561403 has 8 divisors (see below), whose sum is σ = 149112576. Its totient is φ = 124033000.

The previous prime is 136561363. The next prime is 136561429. The reversal of 136561403 is 304165631.

It is a happy number.

136561403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 136561403 - 2¹² = 136557307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136561433) 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, 8378 + ... + 18528.

It is an arithmetic number, because the mean of its divisors is an integer number (18639072).

Almost surely, 2^136561403 is an apocalyptic number.

136561403 is a deficient number, since it is larger than the sum of its proper divisors (12551173).

136561403 is a wasteful number, since it uses less digits than its factorization.

136561403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11385.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 136561403 is about 11685.9489559043. The cubic root of 136561403 is about 514.9629570868.

The spelling of 136561403 in words is "one hundred thirty-six million, five hundred sixty-one thousand, four hundred three".