136536321 has 16 divisors (see below), whose sum is σ = 191885760. Its totient is φ = 86224320.

The previous prime is 136536319. The next prime is 136536359. The reversal of 136536321 is 123635631.

It is a happy number.

It is not a de Polignac number, because 136536321 - 2¹ = 136536319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136536311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10195 + ... + 19416.

It is an arithmetic number, because the mean of its divisors is an integer number (11992860).

Almost surely, 2^136536321 is an apocalyptic number.

It is an amenable number.

136536321 is a deficient number, since it is larger than the sum of its proper divisors (55349439).

136536321 is a wasteful number, since it uses less digits than its factorization.

136536321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29696.

The product of its digits is 9720, while the sum is 30.

The square root of 136536321 is about 11684.8757374651. The cubic root of 136536321 is about 514.9314277004.

The spelling of 136536321 in words is "one hundred thirty-six million, five hundred thirty-six thousand, three hundred twenty-one".