136105109 has 4 divisors (see below), whose sum is σ = 155548704. Its totient is φ = 116661516.

The previous prime is 136105061. The next prime is 136105121. The reversal of 136105109 is 901501631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901501631 = 2129 ⋅423439.

It is a cyclic number.

It is not a de Polignac number, because 136105109 - 2¹² = 136101013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136105169) 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, 9721787 + ... + 9721800.

It is an arithmetic number, because the mean of its divisors is an integer number (38887176).

Almost surely, 2^136105109 is an apocalyptic number.

It is an amenable number.

136105109 is a deficient number, since it is larger than the sum of its proper divisors (19443595).

136105109 is an equidigital number, since it uses as much as digits as its factorization.

136105109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19443594.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 136105109 is about 11666.4094304975. The cubic root of 136105109 is about 514.3887667792.

The spelling of 136105109 in words is "one hundred thirty-six million, one hundred five thousand, one hundred nine".