136021849 has 4 divisors (see below), whose sum is σ = 137885236. Its totient is φ = 134158464.

The previous prime is 136021819. The next prime is 136021867. The reversal of 136021849 is 948120631.

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 69305625 + 66716224 = 8325^2 + 8168^2 .

It is a cyclic number.

It is not a de Polignac number, because 136021849 - 2¹⁵ = 135989081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136021819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 931584 + ... + 931729.

It is an arithmetic number, because the mean of its divisors is an integer number (34471309).

Almost surely, 2^136021849 is an apocalyptic number.

It is an amenable number.

136021849 is a deficient number, since it is larger than the sum of its proper divisors (1863387).

136021849 is an equidigital number, since it uses as much as digits as its factorization.

136021849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863386.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 136021849 is about 11662.8405202163. The cubic root of 136021849 is about 514.2838558391.

It can be divided in two parts, 13602 and 1849, that added together give a palindrome (15451).

The spelling of 136021849 in words is "one hundred thirty-six million, twenty-one thousand, eight hundred forty-nine".