136605631 has 8 divisors (see below), whose sum is σ = 142718400. Its totient is φ = 130586400.

The previous prime is 136605629. The next prime is 136605643. The reversal of 136605631 is 136506631.

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 136605631 - 2¹ = 136605629 is a prime.

It is a super-3 number, since 3×136605631³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136605593 and 136605602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136605661) 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, 20391 + ... + 26248.

It is an arithmetic number, because the mean of its divisors is an integer number (17839800).

Almost surely, 2^136605631 is an apocalyptic number.

136605631 is a deficient number, since it is larger than the sum of its proper divisors (6112769).

136605631 is a wasteful number, since it uses less digits than its factorization.

136605631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46769.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 136605631 is about 11687.8411607961. The cubic root of 136605631 is about 515.0185445925.

It can be divided in two parts, 13660 and 5631, that added together give a palindrome (19291).

The spelling of 136605631 in words is "one hundred thirty-six million, six hundred five thousand, six hundred thirty-one".