135620101 has 4 divisors (see below), whose sum is σ = 143597772. Its totient is φ = 127642432.

The previous prime is 135620077. The next prime is 135620113. The reversal of 135620101 is 101026531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40947201 + 94672900 = 6399^2 + 9730^2 .

It is a cyclic number.

It is not a de Polignac number, because 135620101 - 2⁷ = 135619973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135620171) 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, 3988810 + ... + 3988843.

It is an arithmetic number, because the mean of its divisors is an integer number (35899443).

Almost surely, 2^135620101 is an apocalyptic number.

It is an amenable number.

135620101 is a deficient number, since it is larger than the sum of its proper divisors (7977671).

135620101 is an equidigital number, since it uses as much as digits as its factorization.

135620101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7977670.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 135620101 is about 11645.6043638791. The cubic root of 135620101 is about 513.7770346672. Note that the first 3 decimals are identical.

Adding to 135620101 its reverse (101026531), we get a palindrome (236646632).

The spelling of 135620101 in words is "one hundred thirty-five million, six hundred twenty thousand, one hundred one".