136081801 has 4 divisors (see below), whose sum is σ = 137610900. Its totient is φ = 134552704.

The previous prime is 136081721. The next prime is 136081811. The reversal of 136081801 is 108180631.

It is a happy number.

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 82791801 + 53290000 = 9099^2 + 7300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136081801 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 136081801.

It is not an unprimeable number, because it can be changed into a prime (136081811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764416 + ... + 764593.

It is an arithmetic number, because the mean of its divisors is an integer number (34402725).

Almost surely, 2^136081801 is an apocalyptic number.

It is an amenable number.

136081801 is a deficient number, since it is larger than the sum of its proper divisors (1529099).

136081801 is an equidigital number, since it uses as much as digits as its factorization.

136081801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529098.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 136081801 is about 11665.4104514158. The cubic root of 136081801 is about 514.3594020773.

The spelling of 136081801 in words is "one hundred thirty-six million, eighty-one thousand, eight hundred one".