136863217 has 4 divisors (see below), whose sum is σ = 138274276. Its totient is φ = 135452160.

The previous prime is 136863187. The next prime is 136863253. The reversal of 136863217 is 712368631.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33454656 + 103408561 = 5784^2 + 10169^2 .

It is a cyclic number.

It is not a de Polignac number, because 136863217 - 2²³ = 128474609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136863257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705384 + ... + 705577.

It is an arithmetic number, because the mean of its divisors is an integer number (34568569).

Almost surely, 2^136863217 is an apocalyptic number.

It is an amenable number.

136863217 is a deficient number, since it is larger than the sum of its proper divisors (1411059).

136863217 is an equidigital number, since it uses as much as digits as its factorization.

136863217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411058.

The product of its digits is 36288, while the sum is 37.

The square root of 136863217 is about 11698.8553713601. The cubic root of 136863217 is about 515.3420507079.

The spelling of 136863217 in words is "one hundred thirty-six million, eight hundred sixty-three thousand, two hundred seventeen".