135606643 has 4 divisors (see below), whose sum is σ = 141502608. Its totient is φ = 129710680.

The previous prime is 135606619. The next prime is 135606673. The reversal of 135606643 is 346606531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135606643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135606599 and 135606608.

It is not an unprimeable number, because it can be changed into a prime (135606673) 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, 2947948 + ... + 2947993.

It is an arithmetic number, because the mean of its divisors is an integer number (35375652).

Almost surely, 2^135606643 is an apocalyptic number.

135606643 is a deficient number, since it is larger than the sum of its proper divisors (5895965).

135606643 is an equidigital number, since it uses as much as digits as its factorization.

135606643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5895964.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 135606643 is about 11645.0265349633. The cubic root of 135606643 is about 513.7600395463.

The spelling of 135606643 in words is "one hundred thirty-five million, six hundred six thousand, six hundred forty-three".