136378453 has 4 divisors (see below), whose sum is σ = 136519020. Its totient is φ = 136237888.

The previous prime is 136378439. The next prime is 136378469. The reversal of 136378453 is 354873631.

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 123143409 + 13235044 = 11097^2 + 3638^2 .

It is a cyclic number.

It is not a de Polignac number, because 136378453 - 2⁵ = 136378421 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 (136378483) 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, 68818 + ... + 70771.

It is an arithmetic number, because the mean of its divisors is an integer number (34129755).

Almost surely, 2^136378453 is an apocalyptic number.

It is an amenable number.

136378453 is a deficient number, since it is larger than the sum of its proper divisors (140567).

136378453 is an equidigital number, since it uses as much as digits as its factorization.

136378453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140566.

The product of its digits is 181440, while the sum is 40.

The square root of 136378453 is about 11678.1185556578. The cubic root of 136378453 is about 514.7328906744.

The spelling of 136378453 in words is "one hundred thirty-six million, three hundred seventy-eight thousand, four hundred fifty-three".