136214861 has 4 divisors (see below), whose sum is σ = 138080892. Its totient is φ = 134348832.

The previous prime is 136214843. The next prime is 136214873. The reversal of 136214861 is 168412631.

136214861 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, and also an emirpimes, since its reverse is a distinct semiprime: 168412631 = 643 ⋅261917.

It can be written as a sum of positive squares in 2 ways, for example, as 119355625 + 16859236 = 10925^2 + 4106^2 .

It is a cyclic number.

It is not a de Polignac number, because 136214861 - 2¹⁴ = 136198477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136214461) 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, 932906 + ... + 933051.

It is an arithmetic number, because the mean of its divisors is an integer number (34520223).

Almost surely, 2^136214861 is an apocalyptic number.

It is an amenable number.

136214861 is a deficient number, since it is larger than the sum of its proper divisors (1866031).

136214861 is an equidigital number, since it uses as much as digits as its factorization.

136214861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866030.

The product of its digits is 6912, while the sum is 32.

The square root of 136214861 is about 11671.1122434839. The cubic root of 136214861 is about 514.5269933513.

The spelling of 136214861 in words is "one hundred thirty-six million, two hundred fourteen thousand, eight hundred sixty-one".