136220347 has 8 divisors (see below), whose sum is σ = 141590736. Its totient is φ = 130938912.

The previous prime is 136220317. The next prime is 136220351. The reversal of 136220347 is 743022631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136220347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136220317) 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, 19108 + ... + 25249.

It is an arithmetic number, because the mean of its divisors is an integer number (17698842).

Almost surely, 2^136220347 is an apocalyptic number.

136220347 is a deficient number, since it is larger than the sum of its proper divisors (5370389).

136220347 is an equidigital number, since it uses as much as digits as its factorization.

136220347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44477.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 136220347 is about 11671.3472658472. The cubic root of 136220347 is about 514.5339007161.

Adding to 136220347 its reverse (743022631), we get a palindrome (879242978).

The spelling of 136220347 in words is "one hundred thirty-six million, two hundred twenty thousand, three hundred forty-seven".