136853643 has 4 divisors (see below), whose sum is σ = 182471528. Its totient is φ = 91235760.

The previous prime is 136853641. The next prime is 136853663. The reversal of 136853643 is 346358631.

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

It is not a de Polignac number, because 136853643 - 2¹ = 136853641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136853641) 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, 22808938 + ... + 22808943.

It is an arithmetic number, because the mean of its divisors is an integer number (45617882).

Almost surely, 2^136853643 is an apocalyptic number.

136853643 is a deficient number, since it is larger than the sum of its proper divisors (45617885).

136853643 is an equidigital number, since it uses as much as digits as its factorization.

136853643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45617884.

The product of its digits is 155520, while the sum is 39.

The square root of 136853643 is about 11698.4461788735. The cubic root of 136853643 is about 515.3300338443.

The spelling of 136853643 in words is "one hundred thirty-six million, eight hundred fifty-three thousand, six hundred forty-three".