136780219 has 4 divisors (see below), whose sum is σ = 137147296. Its totient is φ = 136413144.

The previous prime is 136780213. The next prime is 136780229. The reversal of 136780219 is 912087631.

136780219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 136780219 - 2⁵ = 136780187 is a prime.

It is a super-2 number, since 2×136780219² = 37417656619375922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136780213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182979 + ... + 183724.

It is an arithmetic number, because the mean of its divisors is an integer number (34286824).

Almost surely, 2^136780219 is an apocalyptic number.

136780219 is a deficient number, since it is larger than the sum of its proper divisors (367077).

136780219 is an equidigital number, since it uses as much as digits as its factorization.

136780219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367076.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 136780219 is about 11695.3075632922. The cubic root of 136780219 is about 515.2378566336.

The spelling of 136780219 in words is "one hundred thirty-six million, seven hundred eighty thousand, two hundred nineteen".