136044643 has 4 divisors (see below), whose sum is σ = 155479600. Its totient is φ = 116609688.

The previous prime is 136044613. The next prime is 136044653. The reversal of 136044643 is 346440631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346440631 = 173 ⋅2002547.

It is a cyclic number.

It is not a de Polignac number, because 136044643 - 2⁵ = 136044611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136044613) 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, 9717468 + ... + 9717481.

It is an arithmetic number, because the mean of its divisors is an integer number (38869900).

Almost surely, 2^136044643 is an apocalyptic number.

136044643 is a deficient number, since it is larger than the sum of its proper divisors (19434957).

136044643 is an equidigital number, since it uses as much as digits as its factorization.

136044643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19434956.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 136044643 is about 11663.8176854750. The cubic root of 136044643 is about 514.3125814484.

The spelling of 136044643 in words is "one hundred thirty-six million, forty-four thousand, six hundred forty-three".