136154321 has 4 divisors (see below), whose sum is σ = 136235700. Its totient is φ = 136072944.

The previous prime is 136154281. The next prime is 136154327. The reversal of 136154321 is 123451631.

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 47059600 + 89094721 = 6860^2 + 9439^2 .

It is a cyclic number.

It is not a de Polignac number, because 136154321 - 2¹⁸ = 135892177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136154327) 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, 38126 + ... + 41543.

It is an arithmetic number, because the mean of its divisors is an integer number (34058925).

Almost surely, 2^136154321 is an apocalyptic number.

It is an amenable number.

136154321 is a deficient number, since it is larger than the sum of its proper divisors (81379).

136154321 is an equidigital number, since it uses as much as digits as its factorization.

136154321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81378.

The product of its digits is 2160, while the sum is 26.

The square root of 136154321 is about 11668.5183720985. The cubic root of 136154321 is about 514.4507557567.

The spelling of 136154321 in words is "one hundred thirty-six million, one hundred fifty-four thousand, three hundred twenty-one".