136618243 has 8 divisors (see below), whose sum is σ = 138381408. Its totient is φ = 134865024.

The previous prime is 136618241. The next prime is 136618283. The reversal of 136618243 is 342816631.

It is a happy number.

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 136618243 - 2¹ = 136618241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136618199 and 136618208.

It is not an unprimeable number, because it can be changed into a prime (136618241) 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, 27421 + ... + 32017.

It is an arithmetic number, because the mean of its divisors is an integer number (17297676).

Almost surely, 2^136618243 is an apocalyptic number.

136618243 is a deficient number, since it is larger than the sum of its proper divisors (1763165).

136618243 is a wasteful number, since it uses less digits than its factorization.

136618243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973.

The product of its digits is 20736, while the sum is 34.

The square root of 136618243 is about 11688.3806833967. The cubic root of 136618243 is about 515.0343936561.

It can be divided in two parts, 13661 and 8243, that added together give a square (21904 = 148²).

The spelling of 136618243 in words is "one hundred thirty-six million, six hundred eighteen thousand, two hundred forty-three".