135643501 has 8 divisors (see below), whose sum is σ = 155157120. Its totient is φ = 116163888.

The previous prime is 135643439. The next prime is 135643523. The reversal of 135643501 is 105346531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135643501 - 2¹³ = 135635309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135643501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135643531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720 + ... + 16486.

It is an arithmetic number, because the mean of its divisors is an integer number (19394640).

Almost surely, 2^135643501 is an apocalyptic number.

It is an amenable number.

135643501 is a deficient number, since it is larger than the sum of its proper divisors (19513619).

135643501 is a wasteful number, since it uses less digits than its factorization.

135643501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17003.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 135643501 is about 11646.6089914618. The cubic root of 135643501 is about 513.8065821338.

The spelling of 135643501 in words is "one hundred thirty-five million, six hundred forty-three thousand, five hundred one".