136823858 has 4 divisors (see below), whose sum is σ = 205235790. Its totient is φ = 68411928.

The previous prime is 136823833. The next prime is 136823879. The reversal of 136823858 is 858328631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 858328631 = 29 ⋅29597539.

It can be written as a sum of positive squares in only one way, i.e., 93566929 + 43256929 = 9673^2 + 6577^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34205963 + ... + 34205966.

Almost surely, 2^136823858 is an apocalyptic number.

136823858 is a deficient number, since it is larger than the sum of its proper divisors (68411932).

136823858 is an equidigital number, since it uses as much as digits as its factorization.

136823858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68411931.

The product of its digits is 276480, while the sum is 44.

The square root of 136823858 is about 11697.1730772867. The cubic root of 136823858 is about 515.2926454382.

The spelling of 136823858 in words is "one hundred thirty-six million, eight hundred twenty-three thousand, eight hundred fifty-eight".