136564493 has 8 divisors (see below), whose sum is σ = 147222936. Its totient is φ = 125928000.

The previous prime is 136564489. The next prime is 136564499. The reversal of 136564493 is 394465631.

It can be written as a sum of positive squares in 4 ways, for example, as 39778249 + 96786244 = 6307^2 + 9838^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 136564493 - 2² = 136564489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136564493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136564499) 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 7 ways as a sum of consecutive naturals, for example, 8843 + ... + 18743.

It is an arithmetic number, because the mean of its divisors is an integer number (18402867).

Almost surely, 2^136564493 is an apocalyptic number.

136564493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

136564493 is a deficient number, since it is larger than the sum of its proper divisors (10658443).

136564493 is a wasteful number, since it uses less digits than its factorization.

136564493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10975.

The product of its digits is 233280, while the sum is 41.

The square root of 136564493 is about 11686.0811652153. The cubic root of 136564493 is about 514.9668411114.

The spelling of 136564493 in words is "one hundred thirty-six million, five hundred sixty-four thousand, four hundred ninety-three".