136081905 has 8 divisors (see below), whose sum is σ = 217731072. Its totient is φ = 72577008.

The previous prime is 136081877. The next prime is 136081919. The reversal of 136081905 is 509180631.

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

It is not a de Polignac number, because 136081905 - 2¹¹ = 136079857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4536049 + ... + 4536078.

It is an arithmetic number, because the mean of its divisors is an integer number (27216384).

Almost surely, 2^136081905 is an apocalyptic number.

136081905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136081905 is a deficient number, since it is larger than the sum of its proper divisors (81649167).

136081905 is an equidigital number, since it uses as much as digits as its factorization.

136081905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9072135.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 136081905 is about 11665.4149090377. The cubic root of 136081905 is about 514.3595331097.

The spelling of 136081905 in words is "one hundred thirty-six million, eighty-one thousand, nine hundred five".